Add index to issue_user.issue_id
(#27154)
This fixes a performance bottleneck. It was discovered by Codeberg. Every where query on that table (which has grown big over time) uses this column, but there is no index on it. See this part of the log which was posted on Matrix: ``` 2023/09/10 00:52:01 ...rs/web/repo/issue.go:1446:ViewIssue() [W] [Slow SQL Query] UPDATE `issue_user` SET is_read=? WHERE uid=? AND issue_id=? [true x y] - 51.395434887s 2023/09/10 00:52:01 ...rs/web/repo/issue.go:1447:ViewIssue() [E] ReadBy: Error 1205 (HY000): Lock wait timeout exceeded; try restarting transaction 2023/09/10 00:52:01 ...eb/routing/logger.go:102:func1() [I] router: completed GET /Codeberg/Community/issues/1201 for [::ffff:xxx]:0, 500 Internal Server Error in 52384.2ms @ repo/issue.go:1256(repo.ViewIssue) ```
This commit is contained in:
parent
2001ffee3f
commit
14731a34ff
3 changed files with 19 additions and 1 deletions
|
@ -15,7 +15,7 @@ import (
|
|||
type IssueUser struct {
|
||||
ID int64 `xorm:"pk autoincr"`
|
||||
UID int64 `xorm:"INDEX"` // User ID.
|
||||
IssueID int64
|
||||
IssueID int64 `xorm:"INDEX"`
|
||||
IsRead bool
|
||||
IsMentioned bool
|
||||
}
|
||||
|
|
|
@ -534,6 +534,8 @@ var migrations = []Migration{
|
|||
NewMigration("Add ScheduleID for ActionRun", v1_21.AddScheduleIDForActionRun),
|
||||
// v276 -> v277
|
||||
NewMigration("Add RemoteAddress to mirrors", v1_21.AddRemoteAddressToMirrors),
|
||||
// v277 -> v278
|
||||
NewMigration("Add Index to issue_user.issue_id", v1_21.AddIndexToIssueUserIssueID),
|
||||
}
|
||||
|
||||
// GetCurrentDBVersion returns the current db version
|
||||
|
|
16
models/migrations/v1_21/v277.go
Normal file
16
models/migrations/v1_21/v277.go
Normal file
|
@ -0,0 +1,16 @@
|
|||
// Copyright 2023 The Gitea Authors. All rights reserved.
|
||||
// SPDX-License-Identifier: MIT
|
||||
|
||||
package v1_21 //nolint
|
||||
|
||||
import (
|
||||
"xorm.io/xorm"
|
||||
)
|
||||
|
||||
func AddIndexToIssueUserIssueID(x *xorm.Engine) error {
|
||||
type IssueUser struct {
|
||||
IssueID int64 `xorm:"INDEX"`
|
||||
}
|
||||
|
||||
return x.Sync(new(IssueUser))
|
||||
}
|
Loading…
Reference in a new issue