diff --git a/custom/conf/app.example.ini b/custom/conf/app.example.ini
index 0d0d809755..c53175b2e0 100644
--- a/custom/conf/app.example.ini
+++ b/custom/conf/app.example.ini
@@ -61,7 +61,7 @@ RUN_MODE = ; prod
 ;; SSL Cipher Suites
 ;SSL_CIPHER_SUITES=; Will default to "ecdhe_ecdsa_with_aes_256_gcm_sha384,ecdhe_rsa_with_aes_256_gcm_sha384,ecdhe_ecdsa_with_aes_128_gcm_sha256,ecdhe_rsa_with_aes_128_gcm_sha256,ecdhe_ecdsa_with_chacha20_poly1305,ecdhe_rsa_with_chacha20_poly1305" if aes is supported by hardware, otherwise chacha will be first.
 ;;
-;; Timeout for any write to the connection. (Set to 0 to disable all timeouts.)
+;; Timeout for any write to the connection. (Set to -1 to disable all timeouts.)
 ;PER_WRITE_TIMEOUT = 30s
 ;;
 ;; Timeout per Kb written to connections.
@@ -163,7 +163,7 @@ RUN_MODE = ; prod
 ;; Enable exposure of SSH clone URL to anonymous visitors, default is false
 ;SSH_EXPOSE_ANONYMOUS = false
 ;;
-;; Timeout for any write to ssh connections. (Set to 0 to disable all timeouts.)
+;; Timeout for any write to ssh connections. (Set to -1 to disable all timeouts.)
 ;; Will default to the PER_WRITE_TIMEOUT.
 ;SSH_PER_WRITE_TIMEOUT = 30s
 ;;
@@ -1178,7 +1178,7 @@ PATH =
 ;;
 ;; Control how often the notification endpoint is polled to update the notification
 ;; The timeout will increase to MAX_TIMEOUT in TIMEOUT_STEPs if the notification count is unchanged
-;; Set MIN_TIMEOUT to 0 to turn off
+;; Set MIN_TIMEOUT to -1 to turn off
 ;MIN_TIMEOUT = 10s
 ;MAX_TIMEOUT = 60s
 ;TIMEOUT_STEP = 10s
@@ -1263,7 +1263,7 @@ PATH =
 ;ISSUE_INDEXER_NAME = gitea_issues
 ;;
 ;; Timeout the indexer if it takes longer than this to start.
-;; Set to zero to disable timeout.
+;; Set to -1 to disable timeout.
 ;STARTUP_TIMEOUT = 30s
 ;;
 ;; Issue indexer queue, currently support: channel, levelqueue or redis, default is levelqueue (deprecated - use [queue.issue_indexer])
@@ -1582,7 +1582,7 @@ PATH =
 ;HOST =
 ;;
 ;; Time to keep items in cache if not used, default is 16 hours.
-;; Setting it to 0 disables caching
+;; Setting it to -1 disables caching
 ;ITEM_TTL = 16h
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -1596,7 +1596,7 @@ PATH =
 ;ENABLED = true
 ;;
 ;; Time to keep items in cache if not used, default is 8760 hours.
-;; Setting it to 0 disables caching
+;; Setting it to -1 disables caching
 ;ITEM_TTL = 8760h
 ;;
 ;; Only enable the cache when repository's commits count great than
diff --git a/docs/content/doc/advanced/config-cheat-sheet.en-us.md b/docs/content/doc/advanced/config-cheat-sheet.en-us.md
index 5400f3208e..461795247d 100644
--- a/docs/content/doc/advanced/config-cheat-sheet.en-us.md
+++ b/docs/content/doc/advanced/config-cheat-sheet.en-us.md
@@ -206,7 +206,7 @@ The following configuration set `Content-Type: application/vnd.android.package-a
 
 ### UI - Notification (`ui.notification`)
 
-- `MIN_TIMEOUT`: **10s**: These options control how often notification endpoint is polled to update the notification count. On page load the notification count will be checked after `MIN_TIMEOUT`. The timeout will increase to `MAX_TIMEOUT` by `TIMEOUT_STEP` if the notification count is unchanged. Set MIN_TIMEOUT to 0 to turn off.
+- `MIN_TIMEOUT`: **10s**: These options control how often notification endpoint is polled to update the notification count. On page load the notification count will be checked after `MIN_TIMEOUT`. The timeout will increase to `MAX_TIMEOUT` by `TIMEOUT_STEP` if the notification count is unchanged. Set MIN_TIMEOUT to -1 to turn off.
 - `MAX_TIMEOUT`: **60s**.
 - `TIMEOUT_STEP`: **10s**.
 - `EVENT_SOURCE_UPDATE_TIME`: **10s**: This setting determines how often the database is queried to update notification counts. If the browser client supports `EventSource` and `SharedWorker`, a `SharedWorker` will be used in preference to polling notification endpoint. Set to **-1** to disable the `EventSource`.
@@ -258,7 +258,7 @@ The following configuration set `Content-Type: application/vnd.android.package-a
    most cases you do not need to change the default value. Alter it only if
    your SSH server node is not the same as HTTP node. Do not set this variable
    if `PROTOCOL` is set to `http+unix`.
-- `PER_WRITE_TIMEOUT`: **30s**: Timeout for any write to the connection. (Set to 0 to
+- `PER_WRITE_TIMEOUT`: **30s**: Timeout for any write to the connection. (Set to -1 to
    disable all timeouts.)
 - `PER_WRITE_PER_KB_TIMEOUT`: **10s**: Timeout per Kb written to connections.
 
@@ -287,7 +287,7 @@ The following configuration set `Content-Type: application/vnd.android.package-a
 - `SSH_KEYGEN_PATH`: **ssh-keygen**: Path to ssh-keygen, default is 'ssh-keygen' which means the shell is responsible for finding out which one to call.
 - `SSH_EXPOSE_ANONYMOUS`: **false**: Enable exposure of SSH clone URL to anonymous visitors, default is false.
 - `SSH_PER_WRITE_TIMEOUT`: **30s**: Timeout for any write to the SSH connections. (Set to
-  0 to disable all timeouts.)
+  -1 to disable all timeouts.)
 - `SSH_PER_WRITE_PER_KB_TIMEOUT`: **10s**: Timeout per Kb written to SSH connections.
 - `MINIMUM_KEY_SIZE_CHECK`: **true**: Indicate whether to check minimum key size with corresponding type.
 
@@ -415,7 +415,7 @@ relation to port exhaustion.
 - `REPO_INDEXER_EXCLUDE_VENDORED`: **true**: Exclude vendored files from index.
 - `UPDATE_BUFFER_LEN`: **20**: Buffer length of index request. **DEPRECATED** use settings in `[queue.issue_indexer]`.
 - `MAX_FILE_SIZE`: **1048576**: Maximum size in bytes of files to be indexed.
-- `STARTUP_TIMEOUT`: **30s**: If the indexer takes longer than this timeout to start - fail. (This timeout will be added to the hammer time above for child processes - as bleve will not start until the previous parent is shutdown.) Set to zero to never timeout.
+- `STARTUP_TIMEOUT`: **30s**: If the indexer takes longer than this timeout to start - fail. (This timeout will be added to the hammer time above for child processes - as bleve will not start until the previous parent is shutdown.) Set to -1 to never timeout.
 
 ## Queue (`queue` and `queue.*`)
 
@@ -687,12 +687,12 @@ Define allowed algorithms and their minimum key length (use -1 to disable a type
    - Redis: `redis://:macaron@127.0.0.1:6379/0?pool_size=100&idle_timeout=180s`
    - Memcache: `127.0.0.1:9090;127.0.0.1:9091`
    - TwoQueue LRU cache: `{"size":50000,"recent_ratio":0.25,"ghost_ratio":0.5}` or `50000` representing the maximum number of objects stored in the cache.
-- `ITEM_TTL`: **16h**: Time to keep items in cache if not used, Setting it to 0 disables caching.
+- `ITEM_TTL`: **16h**: Time to keep items in cache if not used, Setting it to -1 disables caching.
 
 ## Cache - LastCommitCache settings (`cache.last_commit`)
 
 - `ENABLED`: **true**: Enable the cache.
-- `ITEM_TTL`: **8760h**: Time to keep items in cache if not used, Setting it to 0 disables caching.
+- `ITEM_TTL`: **8760h**: Time to keep items in cache if not used, Setting it to -1 disables caching.
 - `COMMITS_COUNT`: **1000**: Only enable the cache when repository's commits count great than.
 
 ## Session (`session`)
diff --git a/docs/content/doc/advanced/config-cheat-sheet.zh-cn.md b/docs/content/doc/advanced/config-cheat-sheet.zh-cn.md
index 600e54a85e..cc6e950fbd 100644
--- a/docs/content/doc/advanced/config-cheat-sheet.zh-cn.md
+++ b/docs/content/doc/advanced/config-cheat-sheet.zh-cn.md
@@ -175,12 +175,12 @@ menu:
 - `HOST`: **\<empty\>**: 针对redis和memcache有效，主机地址和端口。
     - Redis: `network=tcp,addr=127.0.0.1:6379,password=macaron,db=0,pool_size=100,idle_timeout=180`
     - Memache: `127.0.0.1:9090;127.0.0.1:9091`
-- `ITEM_TTL`: **16h**: 缓存项目失效时间，设置为 0 则禁用缓存。
+- `ITEM_TTL`: **16h**: 缓存项目失效时间，设置为 -1 则禁用缓存。
 
 ## Cache - LastCommitCache settings (`cache.last_commit`)
 
 - `ENABLED`: **true**: 是否启用。
-- `ITEM_TTL`: **8760h**: 缓存项目失效时间，设置为 0 则禁用缓存。
+- `ITEM_TTL`: **8760h**: 缓存项目失效时间，设置为 -1 则禁用缓存。
 - `COMMITS_COUNT`: **1000**: 仅当仓库的提交数大于时才启用缓存。
 
 ## Session (`session`)