diff --git a/cmd/admin.go b/cmd/admin.go
index 4346159fe..32ec665ff 100644
--- a/cmd/admin.go
+++ b/cmd/admin.go
@@ -375,17 +375,20 @@ func runRepoSyncReleases(c *cli.Context) error {
 
 			if err = models.SyncReleasesWithTags(repo, gitRepo); err != nil {
 				log.Warn(" SyncReleasesWithTags: %v", err)
+				gitRepo.Close()
 				continue
 			}
 
 			count, err = getReleaseCount(repo.ID)
 			if err != nil {
 				log.Warn(" GetReleaseCountByRepoID: %v", err)
+				gitRepo.Close()
 				continue
 			}
 
 			log.Trace(" repo %s releases synchronized to tags: from %d to %d",
 				repo.FullName(), oldnum, count)
+			gitRepo.Close()
 		}
 	}
 
diff --git a/docs/content/doc/advanced/migrations.en-us.md b/docs/content/doc/advanced/migrations.en-us.md
index 2511f7af8..0d9d8b49a 100644
--- a/docs/content/doc/advanced/migrations.en-us.md
+++ b/docs/content/doc/advanced/migrations.en-us.md
@@ -68,6 +68,7 @@ type Uploader interface {
 	CreateComment(issueNumber int64, comment *Comment) error
 	CreatePullRequest(pr *PullRequest) error
 	Rollback() error
+	Close()
 }
 
-```
\ No newline at end of file
+```
diff --git a/integrations/api_releases_test.go b/integrations/api_releases_test.go
index 897f863eb..8025f1de5 100644
--- a/integrations/api_releases_test.go
+++ b/integrations/api_releases_test.go
@@ -51,6 +51,7 @@ func TestAPICreateAndUpdateRelease(t *testing.T) {
 
 	gitRepo, err := git.OpenRepository(repo.RepoPath())
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 
 	err = gitRepo.CreateTag("v0.0.1", "master")
 	assert.NoError(t, err)
@@ -112,6 +113,7 @@ func TestAPICreateReleaseToDefaultBranchOnExistingTag(t *testing.T) {
 
 	gitRepo, err := git.OpenRepository(repo.RepoPath())
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 
 	err = gitRepo.CreateTag("v0.0.1", "master")
 	assert.NoError(t, err)
diff --git a/integrations/api_repo_file_create_test.go b/integrations/api_repo_file_create_test.go
index 42898bf25..948d3b6f1 100644
--- a/integrations/api_repo_file_create_test.go
+++ b/integrations/api_repo_file_create_test.go
@@ -139,6 +139,7 @@ func TestAPICreateFile(t *testing.T) {
 			assert.EqualValues(t, expectedFileResponse.Commit.HTMLURL, fileResponse.Commit.HTMLURL)
 			assert.EqualValues(t, expectedFileResponse.Commit.Author.Email, fileResponse.Commit.Author.Email)
 			assert.EqualValues(t, expectedFileResponse.Commit.Author.Name, fileResponse.Commit.Author.Name)
+			gitRepo.Close()
 		}
 
 		// Test creating a file in a new branch
diff --git a/integrations/api_repo_file_update_test.go b/integrations/api_repo_file_update_test.go
index 366eb5e91..c19d8d958 100644
--- a/integrations/api_repo_file_update_test.go
+++ b/integrations/api_repo_file_update_test.go
@@ -143,6 +143,7 @@ func TestAPIUpdateFile(t *testing.T) {
 			assert.EqualValues(t, expectedFileResponse.Commit.HTMLURL, fileResponse.Commit.HTMLURL)
 			assert.EqualValues(t, expectedFileResponse.Commit.Author.Email, fileResponse.Commit.Author.Email)
 			assert.EqualValues(t, expectedFileResponse.Commit.Author.Name, fileResponse.Commit.Author.Name)
+			gitRepo.Close()
 		}
 
 		// Test updating a file in a new branch
diff --git a/integrations/api_repo_get_contents_list_test.go b/integrations/api_repo_get_contents_list_test.go
index f74ceb514..4605ccf4d 100644
--- a/integrations/api_repo_get_contents_list_test.go
+++ b/integrations/api_repo_get_contents_list_test.go
@@ -74,6 +74,8 @@ func testAPIGetContentsList(t *testing.T, u *url.URL) {
 	repo1.CreateNewBranch(user2, repo1.DefaultBranch, newBranch)
 	// Get the commit ID of the default branch
 	gitRepo, _ := git.OpenRepository(repo1.RepoPath())
+	defer gitRepo.Close()
+
 	commitID, _ := gitRepo.GetBranchCommitID(repo1.DefaultBranch)
 	// Make a new tag in repo1
 	newTag := "test_tag"
diff --git a/integrations/api_repo_get_contents_test.go b/integrations/api_repo_get_contents_test.go
index f6a43bc5c..77a827ec6 100644
--- a/integrations/api_repo_get_contents_test.go
+++ b/integrations/api_repo_get_contents_test.go
@@ -75,6 +75,8 @@ func testAPIGetContents(t *testing.T, u *url.URL) {
 	repo1.CreateNewBranch(user2, repo1.DefaultBranch, newBranch)
 	// Get the commit ID of the default branch
 	gitRepo, _ := git.OpenRepository(repo1.RepoPath())
+	defer gitRepo.Close()
+
 	commitID, _ := gitRepo.GetBranchCommitID(repo1.DefaultBranch)
 	// Make a new tag in repo1
 	newTag := "test_tag"
diff --git a/integrations/api_repo_git_tags_test.go b/integrations/api_repo_git_tags_test.go
index ae519249e..d6ff08990 100644
--- a/integrations/api_repo_git_tags_test.go
+++ b/integrations/api_repo_git_tags_test.go
@@ -29,6 +29,8 @@ func TestAPIGitTags(t *testing.T) {
 	git.NewCommand("config", "user.email", user.Email).RunInDir(repo.RepoPath())
 
 	gitRepo, _ := git.OpenRepository(repo.RepoPath())
+	defer gitRepo.Close()
+
 	commit, _ := gitRepo.GetBranchCommit("master")
 	lTagName := "lightweightTag"
 	gitRepo.CreateTag(lTagName, commit.ID.String())
diff --git a/integrations/repofiles_delete_test.go b/integrations/repofiles_delete_test.go
index f4cb4510b..10742bf0b 100644
--- a/integrations/repofiles_delete_test.go
+++ b/integrations/repofiles_delete_test.go
@@ -73,6 +73,7 @@ func testDeleteRepoFile(t *testing.T, u *url.URL) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
 	repo := ctx.Repo.Repository
 	doer := ctx.User
 	opts := getDeleteRepoFileOptions(repo)
@@ -111,6 +112,8 @@ func testDeleteRepoFileWithoutBranchNames(t *testing.T, u *url.URL) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	doer := ctx.User
 	opts := getDeleteRepoFileOptions(repo)
@@ -139,6 +142,8 @@ func TestDeleteRepoFileErrors(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	doer := ctx.User
 
diff --git a/integrations/repofiles_update_test.go b/integrations/repofiles_update_test.go
index a4ce16d84..5b88bb819 100644
--- a/integrations/repofiles_update_test.go
+++ b/integrations/repofiles_update_test.go
@@ -191,6 +191,8 @@ func TestCreateOrUpdateRepoFileForCreate(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 		opts := getCreateRepoFileOptions(repo)
@@ -201,6 +203,8 @@ func TestCreateOrUpdateRepoFileForCreate(t *testing.T) {
 		// asserts
 		assert.Nil(t, err)
 		gitRepo, _ := git.OpenRepository(repo.RepoPath())
+		defer gitRepo.Close()
+
 		commitID, _ := gitRepo.GetBranchCommitID(opts.NewBranch)
 		expectedFileResponse := getExpectedFileResponseForRepofilesCreate(commitID)
 		assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
@@ -220,6 +224,8 @@ func TestCreateOrUpdateRepoFileForUpdate(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 		opts := getUpdateRepoFileOptions(repo)
@@ -230,6 +236,8 @@ func TestCreateOrUpdateRepoFileForUpdate(t *testing.T) {
 		// asserts
 		assert.Nil(t, err)
 		gitRepo, _ := git.OpenRepository(repo.RepoPath())
+		defer gitRepo.Close()
+
 		commitID, _ := gitRepo.GetBranchCommitID(opts.NewBranch)
 		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commitID, opts.TreePath)
 		assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
@@ -249,6 +257,8 @@ func TestCreateOrUpdateRepoFileForUpdateWithFileMove(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 		opts := getUpdateRepoFileOptions(repo)
@@ -261,6 +271,8 @@ func TestCreateOrUpdateRepoFileForUpdateWithFileMove(t *testing.T) {
 		// asserts
 		assert.Nil(t, err)
 		gitRepo, _ := git.OpenRepository(repo.RepoPath())
+		defer gitRepo.Close()
+
 		commit, _ := gitRepo.GetBranchCommit(opts.NewBranch)
 		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commit.ID.String(), opts.TreePath)
 		// assert that the old file no longer exists in the last commit of the branch
@@ -288,6 +300,8 @@ func TestCreateOrUpdateRepoFileWithoutBranchNames(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 		opts := getUpdateRepoFileOptions(repo)
@@ -300,6 +314,8 @@ func TestCreateOrUpdateRepoFileWithoutBranchNames(t *testing.T) {
 		// asserts
 		assert.Nil(t, err)
 		gitRepo, _ := git.OpenRepository(repo.RepoPath())
+		defer gitRepo.Close()
+
 		commitID, _ := gitRepo.GetBranchCommitID(repo.DefaultBranch)
 		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commitID, opts.TreePath)
 		assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
@@ -315,6 +331,8 @@ func TestCreateOrUpdateRepoFileErrors(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 
diff --git a/models/graph_test.go b/models/graph_test.go
index 5c78e3877..4e104592a 100644
--- a/models/graph_test.go
+++ b/models/graph_test.go
@@ -17,6 +17,7 @@ func BenchmarkGetCommitGraph(b *testing.B) {
 	if err != nil {
 		b.Error("Could not open repository")
 	}
+	defer currentRepo.Close()
 
 	for i := 0; i < b.N; i++ {
 		graph, err := GetCommitGraph(currentRepo)
diff --git a/models/migrations/v39.go b/models/migrations/v39.go
index 1312cb331..992e06bca 100644
--- a/models/migrations/v39.go
+++ b/models/migrations/v39.go
@@ -47,6 +47,7 @@ func releaseAddColumnIsTagAndSyncTags(x *xorm.Engine) error {
 			if err = models.SyncReleasesWithTags(repo, gitRepo); err != nil {
 				log.Warn("SyncReleasesWithTags: %v", err)
 			}
+			gitRepo.Close()
 		}
 		if len(repos) < pageSize {
 			break
diff --git a/models/migrations/v82.go b/models/migrations/v82.go
index eb73f1834..83da703c8 100644
--- a/models/migrations/v82.go
+++ b/models/migrations/v82.go
@@ -91,6 +91,7 @@ func fixReleaseSha1OnReleaseTable(x *xorm.Engine) error {
 				if err != nil {
 					return err
 				}
+				defer gitRepo.Close()
 				gitRepoCache[release.RepoID] = gitRepo
 			}
 
diff --git a/models/pull.go b/models/pull.go
index 201687457..f93257008 100644
--- a/models/pull.go
+++ b/models/pull.go
@@ -382,6 +382,7 @@ func (pr *PullRequest) GetLastCommitStatus() (status *CommitStatus, err error) {
 	if err != nil {
 		return nil, err
 	}
+	defer headGitRepo.Close()
 
 	lastCommitID, err := headGitRepo.GetBranchCommitID(pr.HeadBranch)
 	if err != nil {
@@ -571,6 +572,7 @@ func (pr *PullRequest) getMergeCommit() (*git.Commit, error) {
 	if err != nil {
 		return nil, fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
 
 	commit, err := gitRepo.GetCommit(mergeCommit[:40])
 	if err != nil {
@@ -955,6 +957,7 @@ func (pr *PullRequest) UpdatePatch() (err error) {
 	if err != nil {
 		return fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer headGitRepo.Close()
 
 	// Add a temporary remote.
 	tmpRemote := com.ToStr(time.Now().UnixNano())
@@ -996,6 +999,7 @@ func (pr *PullRequest) PushToBaseRepo() (err error) {
 	if err != nil {
 		return fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer headGitRepo.Close()
 
 	tmpRemoteName := fmt.Sprintf("tmp-pull-%d", pr.ID)
 	if err = headGitRepo.AddRemote(tmpRemoteName, pr.BaseRepo.RepoPath(), false); err != nil {
@@ -1185,6 +1189,7 @@ func checkForInvalidation(requests PullRequestList, repoID int64, doer *User, br
 		if err != nil {
 			log.Error("PullRequestList.InvalidateCodeComments: %v", err)
 		}
+		gitRepo.Close()
 	}()
 	return nil
 }
diff --git a/models/repo.go b/models/repo.go
index d8a462c37..8875c9637 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -998,6 +998,7 @@ func MigrateRepositoryGitData(doer, u *User, repo *Repository, opts api.MigrateR
 	if err != nil {
 		return repo, fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
 
 	repo.IsEmpty, err = gitRepo.IsEmpty()
 	if err != nil {
diff --git a/models/repo_activity.go b/models/repo_activity.go
index 04612ae1e..c95af8549 100644
--- a/models/repo_activity.go
+++ b/models/repo_activity.go
@@ -64,6 +64,8 @@ func GetActivityStats(repo *Repository, timeFrom time.Time, releases, issues, pr
 		if err != nil {
 			return nil, fmt.Errorf("OpenRepository: %v", err)
 		}
+		defer gitRepo.Close()
+
 		code, err := gitRepo.GetCodeActivityStats(timeFrom, repo.DefaultBranch)
 		if err != nil {
 			return nil, fmt.Errorf("FillFromGit: %v", err)
@@ -79,6 +81,8 @@ func GetActivityStatsTopAuthors(repo *Repository, timeFrom time.Time, count int)
 	if err != nil {
 		return nil, fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
+
 	code, err := gitRepo.GetCodeActivityStats(timeFrom, "")
 	if err != nil {
 		return nil, fmt.Errorf("FillFromGit: %v", err)
diff --git a/models/repo_branch.go b/models/repo_branch.go
index dee6ef3d7..c51323183 100644
--- a/models/repo_branch.go
+++ b/models/repo_branch.go
@@ -23,6 +23,7 @@ func (repo *Repository) GetBranch(branch string) (*git.Branch, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	return gitRepo.GetBranch(branch)
 }
@@ -38,6 +39,7 @@ func (repo *Repository) CheckBranchName(name string) error {
 	if err != nil {
 		return err
 	}
+	defer gitRepo.Close()
 
 	branches, err := repo.GetBranches()
 	if err != nil {
@@ -94,6 +96,7 @@ func (repo *Repository) CreateNewBranch(doer *User, oldBranchName, branchName st
 		log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
 		return fmt.Errorf("Failed to open new temporary repository in: %s %v", basePath, err)
 	}
+	defer gitRepo.Close()
 
 	if err = gitRepo.CreateBranch(branchName, oldBranchName); err != nil {
 		log.Error("Unable to create branch: %s from %s. (%v)", branchName, oldBranchName, err)
@@ -140,6 +143,7 @@ func (repo *Repository) CreateNewBranchFromCommit(doer *User, commit, branchName
 		log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
 		return fmt.Errorf("Failed to open new temporary repository in: %s %v", basePath, err)
 	}
+	defer gitRepo.Close()
 
 	if err = gitRepo.CreateBranch(branchName, commit); err != nil {
 		log.Error("Unable to create branch: %s from %s. (%v)", branchName, commit, err)
diff --git a/models/repo_tag.go b/models/repo_tag.go
deleted file mode 100644
index 3864b7a12..000000000
--- a/models/repo_tag.go
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2019 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
-
-package models
-
-import (
-	"code.gitea.io/gitea/modules/git"
-)
-
-// GetTagsByPath returns repo tags by its path
-func GetTagsByPath(path string) ([]*git.Tag, error) {
-	gitRepo, err := git.OpenRepository(path)
-	if err != nil {
-		return nil, err
-	}
-
-	return gitRepo.GetTagInfos()
-}
-
-// GetTags return repo's tags
-func (repo *Repository) GetTags() ([]*git.Tag, error) {
-	return GetTagsByPath(repo.RepoPath())
-}
diff --git a/models/wiki.go b/models/wiki.go
index 0460e0f07..8a2f739da 100644
--- a/models/wiki.go
+++ b/models/wiki.go
@@ -140,6 +140,7 @@ func (repo *Repository) updateWikiPage(doer *User, oldWikiName, newWikiName, con
 		log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
 		return fmt.Errorf("Failed to open new temporary repository in: %s %v", basePath, err)
 	}
+	defer gitRepo.Close()
 
 	if hasMasterBranch {
 		if err := gitRepo.ReadTreeToIndex("HEAD"); err != nil {
@@ -276,6 +277,7 @@ func (repo *Repository) DeleteWikiPage(doer *User, wikiName string) (err error)
 		log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
 		return fmt.Errorf("Failed to open new temporary repository in: %s %v", basePath, err)
 	}
+	defer gitRepo.Close()
 
 	if err := gitRepo.ReadTreeToIndex("HEAD"); err != nil {
 		log.Error("Unable to read HEAD tree to index in: %s %v", basePath, err)
diff --git a/models/wiki_test.go b/models/wiki_test.go
index 991a3d95b..37c0a8663 100644
--- a/models/wiki_test.go
+++ b/models/wiki_test.go
@@ -161,6 +161,7 @@ func TestRepository_AddWikiPage(t *testing.T) {
 			// Now need to show that the page has been added:
 			gitRepo, err := git.OpenRepository(repo.WikiPath())
 			assert.NoError(t, err)
+			defer gitRepo.Close()
 			masterTree, err := gitRepo.GetTree("master")
 			assert.NoError(t, err)
 			wikiPath := WikiNameToFilename(wikiName)
@@ -214,6 +215,7 @@ func TestRepository_EditWikiPage(t *testing.T) {
 			_, err := masterTree.GetTreeEntryByPath("Home.md")
 			assert.Error(t, err)
 		}
+		gitRepo.Close()
 	}
 }
 
@@ -226,6 +228,7 @@ func TestRepository_DeleteWikiPage(t *testing.T) {
 	// Now need to show that the page has been added:
 	gitRepo, err := git.OpenRepository(repo.WikiPath())
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 	masterTree, err := gitRepo.GetTree("master")
 	assert.NoError(t, err)
 	wikiPath := WikiNameToFilename("Home")
diff --git a/modules/context/api.go b/modules/context/api.go
index 024ae487f..c1de37dd2 100644
--- a/modules/context/api.go
+++ b/modules/context/api.go
@@ -186,7 +186,16 @@ func ReferencesGitRepo(allowEmpty bool) macaron.Handler {
 				return
 			}
 			ctx.Repo.GitRepo = gitRepo
+			// We opened it, we should close it
+			defer func() {
+				// If it's been set to nil then assume someone else has closed it.
+				if ctx.Repo.GitRepo != nil {
+					ctx.Repo.GitRepo.Close()
+				}
+			}()
 		}
+
+		ctx.Next()
 	}
 }
 
diff --git a/modules/context/repo.go b/modules/context/repo.go
index 243b98c7c..1b57b4200 100644
--- a/modules/context/repo.go
+++ b/modules/context/repo.go
@@ -427,9 +427,18 @@ func RepoAssignment() macaron.Handler {
 		}
 		ctx.Repo.GitRepo = gitRepo
 
+		// We opened it, we should close it
+		defer func() {
+			// If it's been set to nil then assume someone else has closed it.
+			if ctx.Repo.GitRepo != nil {
+				ctx.Repo.GitRepo.Close()
+			}
+		}()
+
 		// Stop at this point when the repo is empty.
 		if ctx.Repo.Repository.IsEmpty {
 			ctx.Data["BranchName"] = ctx.Repo.Repository.DefaultBranch
+			ctx.Next()
 			return
 		}
 
@@ -488,6 +497,7 @@ func RepoAssignment() macaron.Handler {
 			ctx.Data["GoDocDirectory"] = prefix + "{/dir}"
 			ctx.Data["GoDocFile"] = prefix + "{/dir}/{file}#L{line}"
 		}
+		ctx.Next()
 	}
 }
 
@@ -593,6 +603,13 @@ func RepoRefByType(refType RepoRefType) macaron.Handler {
 				ctx.ServerError("RepoRef Invalid repo "+repoPath, err)
 				return
 			}
+			// We opened it, we should close it
+			defer func() {
+				// If it's been set to nil then assume someone else has closed it.
+				if ctx.Repo.GitRepo != nil {
+					ctx.Repo.GitRepo.Close()
+				}
+			}()
 		}
 
 		// Get default branch.
@@ -681,6 +698,8 @@ func RepoRefByType(refType RepoRefType) macaron.Handler {
 			return
 		}
 		ctx.Data["CommitsCount"] = ctx.Repo.CommitsCount
+
+		ctx.Next()
 	}
 }
 
diff --git a/modules/git/blame.go b/modules/git/blame.go
index 548236b65..4f4343fe9 100644
--- a/modules/git/blame.go
+++ b/modules/git/blame.go
@@ -87,10 +87,11 @@ func (r *BlameReader) Close() error {
 
 // CreateBlameReader creates reader for given repository, commit and file
 func CreateBlameReader(repoPath, commitID, file string) (*BlameReader, error) {
-	_, err := OpenRepository(repoPath)
+	gitRepo, err := OpenRepository(repoPath)
 	if err != nil {
 		return nil, err
 	}
+	gitRepo.Close()
 
 	return createBlameReader(repoPath, GitExecutable, "blame", commitID, "--porcelain", "--", file)
 }
diff --git a/modules/git/blob_test.go b/modules/git/blob_test.go
index 66c046ecc..9043de595 100644
--- a/modules/git/blob_test.go
+++ b/modules/git/blob_test.go
@@ -37,6 +37,8 @@ THE SOFTWARE.
 `
 	repo, err := OpenRepository("../../.git")
 	assert.NoError(t, err)
+	defer repo.Close()
+
 	testBlob, err := repo.GetBlob("a8d4b49dd073a4a38a7e58385eeff7cc52568697")
 	assert.NoError(t, err)
 
@@ -55,6 +57,8 @@ func Benchmark_Blob_Data(b *testing.B) {
 	if err != nil {
 		b.Fatal(err)
 	}
+	defer repo.Close()
+
 	testBlob, err := repo.GetBlob("a8d4b49dd073a4a38a7e58385eeff7cc52568697")
 	if err != nil {
 		b.Fatal(err)
diff --git a/modules/git/commit_info_test.go b/modules/git/commit_info_test.go
index 71637d188..ac7bc43c4 100644
--- a/modules/git/commit_info_test.go
+++ b/modules/git/commit_info_test.go
@@ -77,6 +77,8 @@ func TestEntries_GetCommitsInfo(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
+
 	testGetCommitsInfo(t, bareRepo1)
 
 	clonedPath, err := cloneRepo(bareRepo1Path, testReposDir, "repo1_TestEntries_GetCommitsInfo")
@@ -84,6 +86,8 @@ func TestEntries_GetCommitsInfo(t *testing.T) {
 	defer os.RemoveAll(clonedPath)
 	clonedRepo1, err := OpenRepository(clonedPath)
 	assert.NoError(t, err)
+	defer clonedRepo1.Close()
+
 	testGetCommitsInfo(t, clonedRepo1)
 }
 
@@ -101,13 +105,16 @@ func BenchmarkEntries_GetCommitsInfo(b *testing.B) {
 	for _, benchmark := range benchmarks {
 		var commit *Commit
 		var entries Entries
+		var repo *Repository
 		if repoPath, err := cloneRepo(benchmark.url, benchmarkReposDir, benchmark.name); err != nil {
 			b.Fatal(err)
-		} else if repo, err := OpenRepository(repoPath); err != nil {
+		} else if repo, err = OpenRepository(repoPath); err != nil {
 			b.Fatal(err)
 		} else if commit, err = repo.GetBranchCommit("master"); err != nil {
+			repo.Close()
 			b.Fatal(err)
 		} else if entries, err = commit.Tree.ListEntries(); err != nil {
+			repo.Close()
 			b.Fatal(err)
 		}
 		entries.Sort()
@@ -120,5 +127,6 @@ func BenchmarkEntries_GetCommitsInfo(b *testing.B) {
 				}
 			}
 		})
+		repo.Close()
 	}
 }
diff --git a/modules/git/notes_test.go b/modules/git/notes_test.go
index bf010b9a7..b7939e691 100644
--- a/modules/git/notes_test.go
+++ b/modules/git/notes_test.go
@@ -15,6 +15,7 @@ func TestGetNotes(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	note := Note{}
 	err = GetNote(bareRepo1, "95bb4d39648ee7e325106df01a621c530863a653", &note)
@@ -27,6 +28,7 @@ func TestGetNestedNotes(t *testing.T) {
 	repoPath := filepath.Join(testReposDir, "repo3_notes")
 	repo, err := OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer repo.Close()
 
 	note := Note{}
 	err = GetNote(repo, "3e668dbfac39cbc80a9ff9c61eb565d944453ba4", &note)
diff --git a/modules/git/repo.go b/modules/git/repo.go
index 1a9112132..f3453442c 100644
--- a/modules/git/repo.go
+++ b/modules/git/repo.go
@@ -17,6 +17,7 @@ import (
 	"strings"
 	"time"
 
+	gitealog "code.gitea.io/gitea/modules/log"
 	"github.com/unknwon/com"
 	"gopkg.in/src-d/go-billy.v4/osfs"
 	gogit "gopkg.in/src-d/go-git.v4"
@@ -107,6 +108,21 @@ func OpenRepository(repoPath string) (*Repository, error) {
 	}, nil
 }
 
+// Close this repository, in particular close the underlying gogitStorage if this is not nil
+func (repo *Repository) Close() {
+	if repo == nil || repo.gogitStorage == nil {
+		return
+	}
+	if err := repo.gogitStorage.Close(); err != nil {
+		gitealog.Error("Error closing storage: %v", err)
+	}
+}
+
+// GoGitRepo gets the go-git repo representation
+func (repo *Repository) GoGitRepo() *gogit.Repository {
+	return repo.gogitRepo
+}
+
 // IsEmpty Check if repository is empty.
 func (repo *Repository) IsEmpty() (bool, error) {
 	var errbuf strings.Builder
diff --git a/modules/git/repo_blob_test.go b/modules/git/repo_blob_test.go
index 128a22782..52a124db2 100644
--- a/modules/git/repo_blob_test.go
+++ b/modules/git/repo_blob_test.go
@@ -17,6 +17,7 @@ func TestRepository_GetBlob_Found(t *testing.T) {
 	repoPath := filepath.Join(testReposDir, "repo1_bare")
 	r, err := OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer r.Close()
 
 	testCases := []struct {
 		OID  string
@@ -44,6 +45,7 @@ func TestRepository_GetBlob_NotExist(t *testing.T) {
 	repoPath := filepath.Join(testReposDir, "repo1_bare")
 	r, err := OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer r.Close()
 
 	testCase := "0000000000000000000000000000000000000000"
 	testError := ErrNotExist{testCase, ""}
@@ -57,6 +59,7 @@ func TestRepository_GetBlob_NoId(t *testing.T) {
 	repoPath := filepath.Join(testReposDir, "repo1_bare")
 	r, err := OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer r.Close()
 
 	testCase := ""
 	testError := fmt.Errorf("Length must be 40: %s", testCase)
diff --git a/modules/git/repo_branch.go b/modules/git/repo_branch.go
index a2bf9ac97..e79bab76a 100644
--- a/modules/git/repo_branch.go
+++ b/modules/git/repo_branch.go
@@ -108,6 +108,7 @@ func GetBranchesByPath(path string) ([]*Branch, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	brs, err := gitRepo.GetBranches()
 	if err != nil {
diff --git a/modules/git/repo_branch_test.go b/modules/git/repo_branch_test.go
index 08736d702..33d31aef6 100644
--- a/modules/git/repo_branch_test.go
+++ b/modules/git/repo_branch_test.go
@@ -15,6 +15,7 @@ func TestRepository_GetBranches(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	branches, err := bareRepo1.GetBranches()
 
@@ -29,6 +30,7 @@ func BenchmarkRepository_GetBranches(b *testing.B) {
 	if err != nil {
 		b.Fatal(err)
 	}
+	defer bareRepo1.Close()
 
 	for i := 0; i < b.N; i++ {
 		_, err := bareRepo1.GetBranches()
diff --git a/modules/git/repo_commit_test.go b/modules/git/repo_commit_test.go
index 6d8ee6453..87dd6763b 100644
--- a/modules/git/repo_commit_test.go
+++ b/modules/git/repo_commit_test.go
@@ -15,6 +15,7 @@ func TestRepository_GetCommitBranches(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	// these test case are specific to the repo1_bare test repo
 	testCases := []struct {
@@ -41,6 +42,7 @@ func TestGetTagCommitWithSignature(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	commit, err := bareRepo1.GetCommit("3ad28a9149a2864384548f3d17ed7f38014c9e8a")
 	assert.NoError(t, err)
@@ -54,6 +56,7 @@ func TestGetCommitWithBadCommitID(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	commit, err := bareRepo1.GetCommit("bad_branch")
 	assert.Nil(t, commit)
diff --git a/modules/git/repo_compare_test.go b/modules/git/repo_compare_test.go
index e19478877..def67fa87 100644
--- a/modules/git/repo_compare_test.go
+++ b/modules/git/repo_compare_test.go
@@ -20,6 +20,7 @@ func TestGetFormatPatch(t *testing.T) {
 	defer os.RemoveAll(clonedPath)
 	repo, err := OpenRepository(clonedPath)
 	assert.NoError(t, err)
+	defer repo.Close()
 	rd, err := repo.GetFormatPatch("8d92fc95^", "8d92fc95")
 	assert.NoError(t, err)
 	patchb, err := ioutil.ReadAll(rd)
diff --git a/modules/git/repo_ref_test.go b/modules/git/repo_ref_test.go
index d32b34994..303c496c1 100644
--- a/modules/git/repo_ref_test.go
+++ b/modules/git/repo_ref_test.go
@@ -15,6 +15,7 @@ func TestRepository_GetRefs(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	refs, err := bareRepo1.GetRefs()
 
@@ -38,6 +39,7 @@ func TestRepository_GetRefsFiltered(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	refs, err := bareRepo1.GetRefsFiltered(TagPrefix)
 
diff --git a/modules/git/repo_stats_test.go b/modules/git/repo_stats_test.go
index 6fbcb7ac1..bc1f6a566 100644
--- a/modules/git/repo_stats_test.go
+++ b/modules/git/repo_stats_test.go
@@ -16,6 +16,7 @@ func TestRepository_GetCodeActivityStats(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	timeFrom, err := time.Parse(time.RFC3339, "2016-01-01T00:00:00+00:00")
 	assert.NoError(t, err)
diff --git a/modules/git/repo_tag_test.go b/modules/git/repo_tag_test.go
index ab9742afc..90f2b3735 100644
--- a/modules/git/repo_tag_test.go
+++ b/modules/git/repo_tag_test.go
@@ -16,6 +16,7 @@ func TestRepository_GetTags(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	tags, err := bareRepo1.GetTagInfos()
 	assert.NoError(t, err)
@@ -34,6 +35,7 @@ func TestRepository_GetTag(t *testing.T) {
 
 	bareRepo1, err := OpenRepository(clonedPath)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	lTagCommitID := "6fbd69e9823458e6c4a2fc5c0f6bc022b2f2acd1"
 	lTagName := "lightweightTag"
@@ -83,6 +85,7 @@ func TestRepository_GetAnnotatedTag(t *testing.T) {
 
 	bareRepo1, err := OpenRepository(clonedPath)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	lTagCommitID := "6fbd69e9823458e6c4a2fc5c0f6bc022b2f2acd1"
 	lTagName := "lightweightTag"
diff --git a/modules/git/repo_test.go b/modules/git/repo_test.go
index 15f5e3781..0b6986764 100644
--- a/modules/git/repo_test.go
+++ b/modules/git/repo_test.go
@@ -30,6 +30,7 @@ func TestRepoIsEmpty(t *testing.T) {
 	emptyRepo2Path := filepath.Join(testReposDir, "repo2_empty")
 	repo, err := OpenRepository(emptyRepo2Path)
 	assert.NoError(t, err)
+	defer repo.Close()
 	isEmpty, err := repo.IsEmpty()
 	assert.NoError(t, err)
 	assert.True(t, isEmpty)
diff --git a/modules/git/tree_entry_test.go b/modules/git/tree_entry_test.go
index c65a691ec..e87290037 100644
--- a/modules/git/tree_entry_test.go
+++ b/modules/git/tree_entry_test.go
@@ -56,6 +56,7 @@ func TestEntriesCustomSort(t *testing.T) {
 func TestFollowLink(t *testing.T) {
 	r, err := OpenRepository("tests/repos/repo1_bare")
 	assert.NoError(t, err)
+	defer r.Close()
 
 	commit, err := r.GetCommit("37991dec2c8e592043f47155ce4808d4580f9123")
 	assert.NoError(t, err)
diff --git a/modules/migrations/base/uploader.go b/modules/migrations/base/uploader.go
index a3a9c9fac..ae1be84b8 100644
--- a/modules/migrations/base/uploader.go
+++ b/modules/migrations/base/uploader.go
@@ -17,4 +17,5 @@ type Uploader interface {
 	CreateComments(comments ...*Comment) error
 	CreatePullRequests(prs ...*PullRequest) error
 	Rollback() error
+	Close()
 }
diff --git a/modules/migrations/gitea.go b/modules/migrations/gitea.go
index 676667b42..81a6116a2 100644
--- a/modules/migrations/gitea.go
+++ b/modules/migrations/gitea.go
@@ -131,6 +131,13 @@ func (g *GiteaLocalUploader) CreateRepo(repo *base.Repository, opts base.Migrate
 	return err
 }
 
+// Close closes this uploader
+func (g *GiteaLocalUploader) Close() {
+	if g.gitRepo != nil {
+		g.gitRepo.Close()
+	}
+}
+
 // CreateTopics creates topics
 func (g *GiteaLocalUploader) CreateTopics(topics ...string) error {
 	return models.SaveTopics(g.repo.ID, topics...)
diff --git a/modules/migrations/migrate.go b/modules/migrations/migrate.go
index bbc1dc2d5..7a5071e12 100644
--- a/modules/migrations/migrate.go
+++ b/modules/migrations/migrate.go
@@ -94,6 +94,7 @@ func migrateRepository(downloader base.Downloader, uploader base.Uploader, opts
 	if err := uploader.CreateRepo(repo, opts); err != nil {
 		return err
 	}
+	defer uploader.Close()
 
 	log.Trace("migrating topics")
 	topics, err := downloader.GetTopics()
diff --git a/modules/repofiles/action.go b/modules/repofiles/action.go
index 9467e4fb7..755c015ca 100644
--- a/modules/repofiles/action.go
+++ b/modules/repofiles/action.go
@@ -53,9 +53,11 @@ func CommitRepoAction(opts CommitRepoActionOptions) error {
 			}
 			if err := gitRepo.SetDefaultBranch(repo.DefaultBranch); err != nil {
 				if !git.IsErrUnsupportedVersion(err) {
+					gitRepo.Close()
 					return err
 				}
 			}
+			gitRepo.Close()
 		}
 	}
 
@@ -132,8 +134,10 @@ func CommitRepoAction(opts CommitRepoActionOptions) error {
 
 			shaSum, err = gitRepo.GetBranchCommitID(refName)
 			if err != nil {
+				gitRepo.Close()
 				log.Error("GetBranchCommitID[%s]: %v", opts.RefFullName, err)
 			}
+			gitRepo.Close()
 			if err = models.PrepareWebhooks(repo, models.HookEventCreate, &api.CreatePayload{
 				Ref:     refName,
 				Sha:     shaSum,
@@ -167,8 +171,10 @@ func CommitRepoAction(opts CommitRepoActionOptions) error {
 		}
 		shaSum, err = gitRepo.GetTagCommitID(refName)
 		if err != nil {
+			gitRepo.Close()
 			log.Error("GetTagCommitID[%s]: %v", opts.RefFullName, err)
 		}
+		gitRepo.Close()
 		if err = models.PrepareWebhooks(repo, models.HookEventCreate, &api.CreatePayload{
 			Ref:     refName,
 			Sha:     shaSum,
diff --git a/modules/repofiles/blob.go b/modules/repofiles/blob.go
index e9d85a0dc..60a05e280 100644
--- a/modules/repofiles/blob.go
+++ b/modules/repofiles/blob.go
@@ -17,6 +17,7 @@ func GetBlobBySHA(repo *models.Repository, sha string) (*api.GitBlobResponse, er
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 	gitBlob, err := gitRepo.GetBlob(sha)
 	if err != nil {
 		return nil, err
diff --git a/modules/repofiles/blob_test.go b/modules/repofiles/blob_test.go
index 1dc183a8a..ddc23aeac 100644
--- a/modules/repofiles/blob_test.go
+++ b/modules/repofiles/blob_test.go
@@ -21,6 +21,8 @@ func TestGetBlobBySHA(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	sha := "65f1bf27bc3bf70f64657658635e66094edbcb4d"
 	ctx.SetParams(":id", "1")
 	ctx.SetParams(":sha", sha)
diff --git a/modules/repofiles/commit_status.go b/modules/repofiles/commit_status.go
index f3dfbf209..3d93c58d8 100644
--- a/modules/repofiles/commit_status.go
+++ b/modules/repofiles/commit_status.go
@@ -23,8 +23,10 @@ func CreateCommitStatus(repo *models.Repository, creator *models.User, sha strin
 		return fmt.Errorf("OpenRepository[%s]: %v", repoPath, err)
 	}
 	if _, err := gitRepo.GetCommit(sha); err != nil {
+		gitRepo.Close()
 		return fmt.Errorf("GetCommit[%s]: %v", sha, err)
 	}
+	gitRepo.Close()
 
 	if err := models.NewCommitStatus(models.NewCommitStatusOptions{
 		Repo:         repo,
diff --git a/modules/repofiles/content.go b/modules/repofiles/content.go
index d7d43ef9d..aed98c33a 100644
--- a/modules/repofiles/content.go
+++ b/modules/repofiles/content.go
@@ -59,6 +59,7 @@ func GetContentsOrList(repo *models.Repository, treePath, ref string) (interface
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	// Get the commit object for the ref
 	commit, err := gitRepo.GetCommit(ref)
@@ -117,6 +118,7 @@ func GetContents(repo *models.Repository, treePath, ref string, forList bool) (*
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	// Get the commit object for the ref
 	commit, err := gitRepo.GetCommit(ref)
diff --git a/modules/repofiles/content_test.go b/modules/repofiles/content_test.go
index cd98c54ea..d024cfd54 100644
--- a/modules/repofiles/content_test.go
+++ b/modules/repofiles/content_test.go
@@ -56,6 +56,8 @@ func TestGetContents(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	treePath := "README.md"
 	ref := ctx.Repo.Repository.DefaultBranch
 
@@ -82,6 +84,8 @@ func TestGetContentsOrListForDir(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	treePath := "" // root dir
 	ref := ctx.Repo.Repository.DefaultBranch
 
@@ -115,6 +119,8 @@ func TestGetContentsOrListForFile(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	treePath := "README.md"
 	ref := ctx.Repo.Repository.DefaultBranch
 
@@ -141,6 +147,8 @@ func TestGetContentsErrors(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	treePath := "README.md"
 	ref := repo.DefaultBranch
@@ -170,6 +178,8 @@ func TestGetContentsOrListErrors(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	treePath := "README.md"
 	ref := repo.DefaultBranch
@@ -198,6 +208,8 @@ func TestGetContentsOrListOfEmptyRepos(t *testing.T) {
 	test.LoadRepo(t, ctx, 15)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 
 	t.Run("empty repo", func(t *testing.T) {
diff --git a/modules/repofiles/diff_test.go b/modules/repofiles/diff_test.go
index de5ed1d75..db2c7552c 100644
--- a/modules/repofiles/diff_test.go
+++ b/modules/repofiles/diff_test.go
@@ -22,6 +22,8 @@ func TestGetDiffPreview(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	branch := ctx.Repo.Repository.DefaultBranch
 	treePath := "README.md"
 	content := "# repo1\n\nDescription for repo1\nthis is a new line"
@@ -119,6 +121,8 @@ func TestGetDiffPreviewErrors(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	branch := ctx.Repo.Repository.DefaultBranch
 	treePath := "README.md"
 	content := "# repo1\n\nDescription for repo1\nthis is a new line"
diff --git a/modules/repofiles/file_test.go b/modules/repofiles/file_test.go
index 7c45139dd..46b5a6c54 100644
--- a/modules/repofiles/file_test.go
+++ b/modules/repofiles/file_test.go
@@ -88,10 +88,13 @@ func TestGetFileResponseFromCommit(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	branch := repo.DefaultBranch
 	treePath := "README.md"
 	gitRepo, _ := git.OpenRepository(repo.RepoPath())
+	defer gitRepo.Close()
 	commit, _ := gitRepo.GetBranchCommit(branch)
 	expectedFileResponse := getExpectedFileResponse()
 
diff --git a/modules/repofiles/temp_repo.go b/modules/repofiles/temp_repo.go
index 4a50e6419..ae4d90594 100644
--- a/modules/repofiles/temp_repo.go
+++ b/modules/repofiles/temp_repo.go
@@ -44,6 +44,7 @@ func NewTemporaryUploadRepository(repo *models.Repository) (*TemporaryUploadRepo
 
 // Close the repository cleaning up all files
 func (t *TemporaryUploadRepository) Close() {
+	defer t.gitRepo.Close()
 	if err := models.RemoveTemporaryPath(t.basePath); err != nil {
 		log.Error("Failed to remove temporary path %s: %v", t.basePath, err)
 	}
diff --git a/modules/repofiles/tree.go b/modules/repofiles/tree.go
index 318a5d152..cf0534563 100644
--- a/modules/repofiles/tree.go
+++ b/modules/repofiles/tree.go
@@ -19,6 +19,7 @@ func GetTreeBySHA(repo *models.Repository, sha string, page, perPage int, recurs
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 	gitTree, err := gitRepo.GetTree(sha)
 	if err != nil || gitTree == nil {
 		return nil, models.ErrSHANotFound{
diff --git a/modules/repofiles/tree_test.go b/modules/repofiles/tree_test.go
index ecff8b907..e1bb812ec 100644
--- a/modules/repofiles/tree_test.go
+++ b/modules/repofiles/tree_test.go
@@ -21,6 +21,8 @@ func TestGetTreeBySHA(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	sha := ctx.Repo.Repository.DefaultBranch
 	page := 1
 	perPage := 10
diff --git a/modules/repofiles/update.go b/modules/repofiles/update.go
index 1a1fe6c38..19dcc87e2 100644
--- a/modules/repofiles/update.go
+++ b/modules/repofiles/update.go
@@ -429,6 +429,7 @@ func PushUpdate(repo *models.Repository, branch string, opts models.PushUpdateOp
 	if err != nil {
 		return fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
 
 	if err = repo.UpdateSize(); err != nil {
 		log.Error("Failed to update size for repository: %v", err)
diff --git a/modules/test/context_tests.go b/modules/test/context_tests.go
index 92df1c576..cf9c5fbc5 100644
--- a/modules/test/context_tests.go
+++ b/modules/test/context_tests.go
@@ -55,6 +55,7 @@ func LoadRepo(t *testing.T, ctx *context.Context, repoID int64) {
 func LoadRepoCommit(t *testing.T, ctx *context.Context) {
 	gitRepo, err := git.OpenRepository(ctx.Repo.Repository.RepoPath())
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 	branch, err := gitRepo.GetHEADBranch()
 	assert.NoError(t, err)
 	ctx.Repo.Commit, err = gitRepo.GetBranchCommit(branch.Name)
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 04ff91fbb..10b827253 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -638,7 +638,7 @@ func RegisterRoutes(m *macaron.Macaron) {
 				}, reqRepoReader(models.UnitTypeCode))
 				m.Group("/tags", func() {
 					m.Get("", repo.ListTags)
-				}, reqRepoReader(models.UnitTypeCode))
+				}, reqRepoReader(models.UnitTypeCode), context.ReferencesGitRepo(true))
 				m.Group("/keys", func() {
 					m.Combo("").Get(repo.ListDeployKeys).
 						Post(bind(api.CreateKeyOption{}), repo.CreateDeployKey)
diff --git a/routers/api/v1/repo/commits.go b/routers/api/v1/repo/commits.go
index 0156aaaa0..163a06a95 100644
--- a/routers/api/v1/repo/commits.go
+++ b/routers/api/v1/repo/commits.go
@@ -51,6 +51,7 @@ func GetSingleCommit(ctx *context.APIContext) {
 		ctx.ServerError("OpenRepository", err)
 		return
 	}
+	defer gitRepo.Close()
 	commit, err := gitRepo.GetCommit(ctx.Params(":sha"))
 	if err != nil {
 		ctx.NotFoundOrServerError("GetCommit", git.IsErrNotExist, err)
@@ -113,6 +114,7 @@ func GetAllCommits(ctx *context.APIContext) {
 		ctx.ServerError("OpenRepository", err)
 		return
 	}
+	defer gitRepo.Close()
 
 	page := ctx.QueryInt("page")
 	if page <= 0 {
diff --git a/routers/api/v1/repo/file.go b/routers/api/v1/repo/file.go
index ae20e1e96..f23e7bca9 100644
--- a/routers/api/v1/repo/file.go
+++ b/routers/api/v1/repo/file.go
@@ -95,6 +95,7 @@ func GetArchive(ctx *context.APIContext) {
 		return
 	}
 	ctx.Repo.GitRepo = gitRepo
+	defer gitRepo.Close()
 
 	repo.Download(ctx.Context)
 }
diff --git a/routers/api/v1/repo/git_ref.go b/routers/api/v1/repo/git_ref.go
index d7acc139f..c2bcbb360 100644
--- a/routers/api/v1/repo/git_ref.go
+++ b/routers/api/v1/repo/git_ref.go
@@ -76,6 +76,8 @@ func getGitRefs(ctx *context.APIContext, filter string) ([]*git.Reference, strin
 	if err != nil {
 		return nil, "OpenRepository", err
 	}
+	defer gitRepo.Close()
+
 	if len(filter) > 0 {
 		filter = "refs/" + filter
 	}
diff --git a/routers/api/v1/repo/pull.go b/routers/api/v1/repo/pull.go
index 4d6a84d8f..2601ab833 100644
--- a/routers/api/v1/repo/pull.go
+++ b/routers/api/v1/repo/pull.go
@@ -194,6 +194,7 @@ func CreatePullRequest(ctx *context.APIContext, form api.CreatePullRequestOption
 	if ctx.Written() {
 		return
 	}
+	defer headGitRepo.Close()
 
 	// Check if another PR exists with the same targets
 	existingPr, err := models.GetUnmergedPullRequest(headRepo.ID, ctx.Repo.Repository.ID, headBranch, baseBranch)
@@ -687,6 +688,7 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
 	// user should have permission to read baseRepo's codes and pulls, NOT headRepo's
 	permBase, err := models.GetUserRepoPermission(baseRepo, ctx.User)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -697,6 +699,7 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
 				baseRepo,
 				permBase)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("Can't read pulls or can't read UnitTypeCode")
 		return nil, nil, nil, nil, "", ""
 	}
@@ -704,6 +707,7 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
 	// user should have permission to read headrepo's codes
 	permHead, err := models.GetUserRepoPermission(headRepo, ctx.User)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -714,18 +718,21 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
 				headRepo,
 				permHead)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("Can't read headRepo UnitTypeCode")
 		return nil, nil, nil, nil, "", ""
 	}
 
 	// Check if head branch is valid.
 	if !headGitRepo.IsBranchExist(headBranch) {
+		headGitRepo.Close()
 		ctx.NotFound()
 		return nil, nil, nil, nil, "", ""
 	}
 
 	compareInfo, err := headGitRepo.GetCompareInfo(models.RepoPath(baseRepo.Owner.Name, baseRepo.Name), baseBranch, headBranch)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.Error(500, "GetCompareInfo", err)
 		return nil, nil, nil, nil, "", ""
 	}
diff --git a/routers/api/v1/repo/tag.go b/routers/api/v1/repo/tag.go
index a80204828..12bac854e 100644
--- a/routers/api/v1/repo/tag.go
+++ b/routers/api/v1/repo/tag.go
@@ -33,7 +33,7 @@ func ListTags(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/TagList"
-	tags, err := ctx.Repo.Repository.GetTags()
+	tags, err := ctx.Repo.GitRepo.GetTagInfos()
 	if err != nil {
 		ctx.Error(500, "GetTags", err)
 		return
diff --git a/routers/repo/compare.go b/routers/repo/compare.go
index f8534f68b..2b66d3818 100644
--- a/routers/repo/compare.go
+++ b/routers/repo/compare.go
@@ -157,6 +157,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 	// user should have permission to read baseRepo's codes and pulls, NOT headRepo's
 	permBase, err := models.GetUserRepoPermission(baseRepo, ctx.User)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -167,6 +168,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 				baseRepo,
 				permBase)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("ParseCompareInfo", nil)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -174,6 +176,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 	// user should have permission to read headrepo's codes
 	permHead, err := models.GetUserRepoPermission(headRepo, ctx.User)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -184,6 +187,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 				headRepo,
 				permHead)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("ParseCompareInfo", nil)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -199,6 +203,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 			ctx.Data["HeadBranch"] = headBranch
 			headIsCommit = true
 		} else {
+			headGitRepo.Close()
 			ctx.NotFound("IsRefExist", nil)
 			return nil, nil, nil, nil, "", ""
 		}
@@ -219,12 +224,14 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 				baseRepo,
 				permBase)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("ParseCompareInfo", nil)
 		return nil, nil, nil, nil, "", ""
 	}
 
 	compareInfo, err := headGitRepo.GetCompareInfo(models.RepoPath(baseRepo.Owner.Name, baseRepo.Name), baseBranch, headBranch)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetCompareInfo", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -345,6 +352,7 @@ func CompareDiff(ctx *context.Context) {
 	if ctx.Written() {
 		return
 	}
+	defer headGitRepo.Close()
 
 	nothingToCompare := PrepareCompareDiff(ctx, headUser, headRepo, headGitRepo, compareInfo, baseBranch, headBranch)
 	if ctx.Written() {
diff --git a/routers/repo/editor_test.go b/routers/repo/editor_test.go
index ca00be74b..ec7aee1e7 100644
--- a/routers/repo/editor_test.go
+++ b/routers/repo/editor_test.go
@@ -48,6 +48,8 @@ func TestGetUniquePatchBranchName(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	expectedBranchName := "user2-patch-1"
 	branchName := GetUniquePatchBranchName(ctx)
 	assert.Equal(t, expectedBranchName, branchName)
@@ -61,9 +63,12 @@ func TestGetClosestParentWithFiles(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	branch := repo.DefaultBranch
 	gitRepo, _ := git.OpenRepository(repo.RepoPath())
+	defer gitRepo.Close()
 	commit, _ := gitRepo.GetBranchCommit(branch)
 	expectedTreePath := ""
 
diff --git a/routers/repo/pull.go b/routers/repo/pull.go
index 23d1718cf..33bf1b2ed 100644
--- a/routers/repo/pull.go
+++ b/routers/repo/pull.go
@@ -337,6 +337,7 @@ func PrepareViewPullInfo(ctx *context.Context, issue *models.Issue) *git.Compare
 			ctx.ServerError("OpenRepository", err)
 			return nil
 		}
+		defer headGitRepo.Close()
 
 		headBranchExist = headGitRepo.IsBranchExist(pull.HeadBranch)
 
@@ -519,6 +520,7 @@ func ViewPullFiles(ctx *context.Context) {
 			ctx.ServerError("OpenRepository", err)
 			return
 		}
+		defer headGitRepo.Close()
 
 		headCommitID, err := headGitRepo.GetBranchCommitID(pull.HeadBranch)
 		if err != nil {
@@ -704,6 +706,7 @@ func CompareAndPullRequestPost(ctx *context.Context, form auth.CreateIssueForm)
 	if ctx.Written() {
 		return
 	}
+	defer headGitRepo.Close()
 
 	labelIDs, assigneeIDs, milestoneID := ValidateRepoMetas(ctx, form, true)
 	if ctx.Written() {
@@ -870,12 +873,14 @@ func CleanUpPullRequest(ctx *context.Context) {
 		ctx.ServerError(fmt.Sprintf("OpenRepository[%s]", pr.HeadRepo.RepoPath()), err)
 		return
 	}
+	defer gitRepo.Close()
 
 	gitBaseRepo, err := git.OpenRepository(pr.BaseRepo.RepoPath())
 	if err != nil {
 		ctx.ServerError(fmt.Sprintf("OpenRepository[%s]", pr.BaseRepo.RepoPath()), err)
 		return
 	}
+	defer gitBaseRepo.Close()
 
 	defer func() {
 		ctx.JSON(200, map[string]interface{}{
@@ -1004,6 +1009,7 @@ func DownloadPullPatch(ctx *context.Context) {
 		ctx.ServerError("OpenRepository", err)
 		return
 	}
+	defer headGitRepo.Close()
 
 	patch, err := headGitRepo.GetFormatPatch(pr.MergeBase, pr.HeadBranch)
 	if err != nil {
diff --git a/routers/repo/release_test.go b/routers/repo/release_test.go
index 524c1c734..47d1a89b5 100644
--- a/routers/repo/release_test.go
+++ b/routers/repo/release_test.go
@@ -57,5 +57,6 @@ func TestNewReleasePost(t *testing.T) {
 			Title:       testCase.Form.Title,
 			Note:        testCase.Form.Content,
 		}, models.Cond("is_draft=?", len(testCase.Form.Draft) > 0))
+		ctx.Repo.GitRepo.Close()
 	}
 }
diff --git a/routers/repo/setting.go b/routers/repo/setting.go
index c74b27342..eb4f27e64 100644
--- a/routers/repo/setting.go
+++ b/routers/repo/setting.go
@@ -71,6 +71,11 @@ func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
 		// Check if repository name has been changed.
 		if repo.LowerName != strings.ToLower(newRepoName) {
 			isNameChanged = true
+			// Close the GitRepo if open
+			if ctx.Repo.GitRepo != nil {
+				ctx.Repo.GitRepo.Close()
+				ctx.Repo.GitRepo = nil
+			}
 			if err := models.ChangeRepositoryName(ctx.Repo.Owner, repo.Name, newRepoName); err != nil {
 				ctx.Data["Err_RepoName"] = true
 				switch {
@@ -378,6 +383,11 @@ func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
 		}
 
 		oldOwnerID := ctx.Repo.Owner.ID
+		// Close the GitRepo if open
+		if ctx.Repo.GitRepo != nil {
+			ctx.Repo.GitRepo.Close()
+			ctx.Repo.GitRepo = nil
+		}
 		if err = models.TransferOwnership(ctx.User, newOwner, repo); err != nil {
 			if models.IsErrRepoAlreadyExist(err) {
 				ctx.RenderWithErr(ctx.Tr("repo.settings.new_owner_has_same_repo"), tplSettingsOptions, nil)
diff --git a/routers/repo/wiki.go b/routers/repo/wiki.go
index 02fbe4a1d..6cf194365 100644
--- a/routers/repo/wiki.go
+++ b/routers/repo/wiki.go
@@ -146,6 +146,9 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 	// Get page list.
 	entries, err := commit.ListEntries()
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		ctx.ServerError("ListEntries", err)
 		return nil, nil
 	}
@@ -159,6 +162,9 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 			if models.IsErrWikiInvalidFileName(err) {
 				continue
 			}
+			if wikiRepo != nil {
+				wikiRepo.Close()
+			}
 			ctx.ServerError("WikiFilenameToName", err)
 			return nil, nil
 		} else if wikiName == "_Sidebar" || wikiName == "_Footer" {
@@ -188,16 +194,25 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 		ctx.Redirect(ctx.Repo.RepoLink + "/wiki/_pages")
 	}
 	if entry == nil || ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return nil, nil
 	}
 
 	sidebarContent, _, _, _ := wikiContentsByName(ctx, commit, "_Sidebar")
 	if ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return nil, nil
 	}
 
 	footerContent, _, _, _ := wikiContentsByName(ctx, commit, "_Footer")
 	if ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return nil, nil
 	}
 
@@ -218,6 +233,9 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 func renderRevisionPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 	wikiRepo, commit, err := findWikiRepoCommit(ctx)
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		if !git.IsErrNotExist(err) {
 			ctx.ServerError("GetBranchCommit", err)
 		}
@@ -241,6 +259,9 @@ func renderRevisionPage(ctx *context.Context) (*git.Repository, *git.TreeEntry)
 		ctx.Redirect(ctx.Repo.RepoLink + "/wiki/_pages")
 	}
 	if entry == nil || ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return nil, nil
 	}
 
@@ -263,6 +284,9 @@ func renderRevisionPage(ctx *context.Context) (*git.Repository, *git.TreeEntry)
 	// get Commit Count
 	commitsHistory, err := wikiRepo.CommitsByFileAndRangeNoFollow("master", pageFilename, page)
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		ctx.ServerError("CommitsByFileAndRangeNoFollow", err)
 		return nil, nil
 	}
@@ -279,13 +303,21 @@ func renderRevisionPage(ctx *context.Context) (*git.Repository, *git.TreeEntry)
 }
 
 func renderEditPage(ctx *context.Context) {
-	_, commit, err := findWikiRepoCommit(ctx)
+	wikiRepo, commit, err := findWikiRepoCommit(ctx)
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		if !git.IsErrNotExist(err) {
 			ctx.ServerError("GetBranchCommit", err)
 		}
 		return
 	}
+	defer func() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+	}()
 
 	// get requested pagename
 	pageName := models.NormalizeWikiName(ctx.Params(":page"))
@@ -327,8 +359,16 @@ func Wiki(ctx *context.Context) {
 
 	wikiRepo, entry := renderViewPage(ctx)
 	if ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return
 	}
+	defer func() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+	}()
 	if entry == nil {
 		ctx.Data["Title"] = ctx.Tr("repo.wiki")
 		ctx.HTML(200, tplWikiStart)
@@ -364,8 +404,16 @@ func WikiRevision(ctx *context.Context) {
 
 	wikiRepo, entry := renderRevisionPage(ctx)
 	if ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return
 	}
+	defer func() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+	}()
 	if entry == nil {
 		ctx.Data["Title"] = ctx.Tr("repo.wiki")
 		ctx.HTML(200, tplWikiStart)
@@ -397,11 +445,18 @@ func WikiPages(ctx *context.Context) {
 
 	wikiRepo, commit, err := findWikiRepoCommit(ctx)
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return
 	}
 
 	entries, err := commit.ListEntries()
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+
 		ctx.ServerError("ListEntries", err)
 		return
 	}
@@ -412,6 +467,10 @@ func WikiPages(ctx *context.Context) {
 		}
 		c, err := wikiRepo.GetCommitByPath(entry.Name())
 		if err != nil {
+			if wikiRepo != nil {
+				wikiRepo.Close()
+			}
+
 			ctx.ServerError("GetCommit", err)
 			return
 		}
@@ -420,6 +479,10 @@ func WikiPages(ctx *context.Context) {
 			if models.IsErrWikiInvalidFileName(err) {
 				continue
 			}
+			if wikiRepo != nil {
+				wikiRepo.Close()
+			}
+
 			ctx.ServerError("WikiFilenameToName", err)
 			return
 		}
@@ -431,6 +494,11 @@ func WikiPages(ctx *context.Context) {
 	}
 	ctx.Data["Pages"] = pages
 
+	defer func() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+	}()
 	ctx.HTML(200, tplWikiPages)
 }
 
diff --git a/routers/repo/wiki_test.go b/routers/repo/wiki_test.go
index 4687d24f6..44fcd0203 100644
--- a/routers/repo/wiki_test.go
+++ b/routers/repo/wiki_test.go
@@ -23,6 +23,7 @@ const message = "Wiki commit message for unit tests"
 func wikiEntry(t *testing.T, repo *models.Repository, wikiName string) *git.TreeEntry {
 	wikiRepo, err := git.OpenRepository(repo.WikiPath())
 	assert.NoError(t, err)
+	defer wikiRepo.Close()
 	commit, err := wikiRepo.GetBranchCommit("master")
 	assert.NoError(t, err)
 	entries, err := commit.ListEntries()
diff --git a/services/comments/comments.go b/services/comments/comments.go
index e8448e906..406cd79ce 100644
--- a/services/comments/comments.go
+++ b/services/comments/comments.go
@@ -60,6 +60,7 @@ func CreateCodeComment(doer *models.User, repo *models.Repository, issue *models
 	if err != nil {
 		return nil, fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
 
 	// FIXME validate treePath
 	// Get latest commit referencing the commented line
diff --git a/services/gitdiff/gitdiff.go b/services/gitdiff/gitdiff.go
index c2c5675d9..9c2aef5c9 100644
--- a/services/gitdiff/gitdiff.go
+++ b/services/gitdiff/gitdiff.go
@@ -678,6 +678,7 @@ func GetDiffRangeWithWhitespaceBehavior(repoPath, beforeCommitID, afterCommitID
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	commit, err := gitRepo.GetCommit(afterCommitID)
 	if err != nil {
@@ -750,6 +751,7 @@ func GetRawDiffForFile(repoPath, startCommit, endCommit string, diffType RawDiff
 	if err != nil {
 		return fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer repo.Close()
 
 	commit, err := repo.GetCommit(endCommit)
 	if err != nil {
diff --git a/services/mirror/mirror.go b/services/mirror/mirror.go
index 7bfc5fd4d..a5e956f3d 100644
--- a/services/mirror/mirror.go
+++ b/services/mirror/mirror.go
@@ -197,8 +197,10 @@ func runSync(m *models.Mirror) ([]*mirrorSyncResult, bool) {
 		return nil, false
 	}
 	if err = models.SyncReleasesWithTags(m.Repo, gitRepo); err != nil {
+		gitRepo.Close()
 		log.Error("Failed to synchronize tags to releases for repository: %v", err)
 	}
+	gitRepo.Close()
 
 	if err := m.Repo.UpdateSize(); err != nil {
 		log.Error("Failed to update size for mirror repository: %v", err)
@@ -290,97 +292,103 @@ func Update() {
 func SyncMirrors() {
 	// Start listening on new sync requests.
 	for repoID := range mirrorQueue.Queue() {
-		log.Trace("SyncMirrors [repo_id: %v]", repoID)
-		mirrorQueue.Remove(repoID)
+		syncMirror(repoID)
+	}
+}
 
-		m, err := models.GetMirrorByRepoID(com.StrTo(repoID).MustInt64())
+func syncMirror(repoID string) {
+	log.Trace("SyncMirrors [repo_id: %v]", repoID)
+	mirrorQueue.Remove(repoID)
+
+	m, err := models.GetMirrorByRepoID(com.StrTo(repoID).MustInt64())
+	if err != nil {
+		log.Error("GetMirrorByRepoID [%s]: %v", repoID, err)
+		return
+
+	}
+
+	results, ok := runSync(m)
+	if !ok {
+		return
+	}
+
+	m.ScheduleNextUpdate()
+	if err = models.UpdateMirror(m); err != nil {
+		log.Error("UpdateMirror [%s]: %v", repoID, err)
+		return
+	}
+
+	var gitRepo *git.Repository
+	if len(results) == 0 {
+		log.Trace("SyncMirrors [repo_id: %d]: no commits fetched", m.RepoID)
+	} else {
+		gitRepo, err = git.OpenRepository(m.Repo.RepoPath())
 		if err != nil {
-			log.Error("GetMirrorByRepoID [%s]: %v", repoID, err)
+			log.Error("OpenRepository [%d]: %v", m.RepoID, err)
+			return
+		}
+		defer gitRepo.Close()
+	}
+
+	for _, result := range results {
+		// Discard GitHub pull requests, i.e. refs/pull/*
+		if strings.HasPrefix(result.refName, "refs/pull/") {
 			continue
 		}
 
-		results, ok := runSync(m)
-		if !ok {
+		// Create reference
+		if result.oldCommitID == gitShortEmptySha {
+			if err = models.MirrorSyncCreateAction(m.Repo, result.refName); err != nil {
+				log.Error("MirrorSyncCreateAction [repo_id: %d]: %v", m.RepoID, err)
+			}
 			continue
 		}
 
-		m.ScheduleNextUpdate()
-		if err = models.UpdateMirror(m); err != nil {
-			log.Error("UpdateMirror [%s]: %v", repoID, err)
+		// Delete reference
+		if result.newCommitID == gitShortEmptySha {
+			if err = models.MirrorSyncDeleteAction(m.Repo, result.refName); err != nil {
+				log.Error("MirrorSyncDeleteAction [repo_id: %d]: %v", m.RepoID, err)
+			}
 			continue
 		}
 
-		var gitRepo *git.Repository
-		if len(results) == 0 {
-			log.Trace("SyncMirrors [repo_id: %d]: no commits fetched", m.RepoID)
-		} else {
-			gitRepo, err = git.OpenRepository(m.Repo.RepoPath())
-			if err != nil {
-				log.Error("OpenRepository [%d]: %v", m.RepoID, err)
-				continue
-			}
-		}
-
-		for _, result := range results {
-			// Discard GitHub pull requests, i.e. refs/pull/*
-			if strings.HasPrefix(result.refName, "refs/pull/") {
-				continue
-			}
-
-			// Create reference
-			if result.oldCommitID == gitShortEmptySha {
-				if err = models.MirrorSyncCreateAction(m.Repo, result.refName); err != nil {
-					log.Error("MirrorSyncCreateAction [repo_id: %d]: %v", m.RepoID, err)
-				}
-				continue
-			}
-
-			// Delete reference
-			if result.newCommitID == gitShortEmptySha {
-				if err = models.MirrorSyncDeleteAction(m.Repo, result.refName); err != nil {
-					log.Error("MirrorSyncDeleteAction [repo_id: %d]: %v", m.RepoID, err)
-				}
-				continue
-			}
-
-			// Push commits
-			oldCommitID, err := git.GetFullCommitID(gitRepo.Path, result.oldCommitID)
-			if err != nil {
-				log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
-				continue
-			}
-			newCommitID, err := git.GetFullCommitID(gitRepo.Path, result.newCommitID)
-			if err != nil {
-				log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
-				continue
-			}
-			commits, err := gitRepo.CommitsBetweenIDs(newCommitID, oldCommitID)
-			if err != nil {
-				log.Error("CommitsBetweenIDs [repo_id: %d, new_commit_id: %s, old_commit_id: %s]: %v", m.RepoID, newCommitID, oldCommitID, err)
-				continue
-			}
-			if err = models.MirrorSyncPushAction(m.Repo, models.MirrorSyncPushActionOptions{
-				RefName:     result.refName,
-				OldCommitID: oldCommitID,
-				NewCommitID: newCommitID,
-				Commits:     models.ListToPushCommits(commits),
-			}); err != nil {
-				log.Error("MirrorSyncPushAction [repo_id: %d]: %v", m.RepoID, err)
-				continue
-			}
-		}
-
-		// Get latest commit date and update to current repository updated time
-		commitDate, err := git.GetLatestCommitTime(m.Repo.RepoPath())
+		// Push commits
+		oldCommitID, err := git.GetFullCommitID(gitRepo.Path, result.oldCommitID)
 		if err != nil {
-			log.Error("GetLatestCommitDate [%d]: %v", m.RepoID, err)
+			log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
 			continue
 		}
+		newCommitID, err := git.GetFullCommitID(gitRepo.Path, result.newCommitID)
+		if err != nil {
+			log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
+			continue
+		}
+		commits, err := gitRepo.CommitsBetweenIDs(newCommitID, oldCommitID)
+		if err != nil {
+			log.Error("CommitsBetweenIDs [repo_id: %d, new_commit_id: %s, old_commit_id: %s]: %v", m.RepoID, newCommitID, oldCommitID, err)
+			continue
+		}
+		if err = models.MirrorSyncPushAction(m.Repo, models.MirrorSyncPushActionOptions{
+			RefName:     result.refName,
+			OldCommitID: oldCommitID,
+			NewCommitID: newCommitID,
+			Commits:     models.ListToPushCommits(commits),
+		}); err != nil {
+			log.Error("MirrorSyncPushAction [repo_id: %d]: %v", m.RepoID, err)
+			continue
+		}
+	}
 
-		if err = models.UpdateRepositoryUpdatedTime(m.RepoID, commitDate); err != nil {
-			log.Error("Update repository 'updated_unix' [%d]: %v", m.RepoID, err)
-			continue
-		}
+	// Get latest commit date and update to current repository updated time
+	commitDate, err := git.GetLatestCommitTime(m.Repo.RepoPath())
+	if err != nil {
+		log.Error("GetLatestCommitDate [%d]: %v", m.RepoID, err)
+		return
+	}
+
+	if err = models.UpdateRepositoryUpdatedTime(m.RepoID, commitDate); err != nil {
+		log.Error("Update repository 'updated_unix' [%d]: %v", m.RepoID, err)
+		return
 	}
 }
 
diff --git a/services/mirror/mirror_test.go b/services/mirror/mirror_test.go
index 9ad11b726..37e8a7be5 100644
--- a/services/mirror/mirror_test.go
+++ b/services/mirror/mirror_test.go
@@ -51,6 +51,7 @@ func TestRelease_MirrorDelete(t *testing.T) {
 
 	gitRepo, err := git.OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 
 	findOptions := models.FindReleasesOptions{IncludeDrafts: true, IncludeTags: true}
 	initCount, err := models.GetReleaseCountByRepoID(mirror.ID, findOptions)
diff --git a/services/pull/commit_status.go b/services/pull/commit_status.go
index 2872db7bd..ca00cdaad 100644
--- a/services/pull/commit_status.go
+++ b/services/pull/commit_status.go
@@ -55,6 +55,7 @@ func IsPullCommitStatusPass(pr *models.PullRequest) (bool, error) {
 	if err != nil {
 		return false, errors.Wrap(err, "OpenRepository")
 	}
+	defer headGitRepo.Close()
 
 	if !headGitRepo.IsBranchExist(pr.HeadBranch) {
 		return false, errors.New("Head branch does not exist, can not merge")
diff --git a/services/release/release_test.go b/services/release/release_test.go
index d30dfee28..effab2125 100644
--- a/services/release/release_test.go
+++ b/services/release/release_test.go
@@ -27,6 +27,7 @@ func TestRelease_Create(t *testing.T) {
 
 	gitRepo, err := git.OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 
 	assert.NoError(t, CreateRelease(gitRepo, &models.Release{
 		RepoID:       repo.ID,