log: support reloading tidb-query-max-log-len after modified (#12491)

pingcap · Oct 12, 2019 · 1f3af1e · 1f3af1e
1 parent 9aca495
commit 1f3af1e
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Showing 3 changed files with 3 additions and 3 deletions.
diff --git a/config/config.toml.example b/config/config.toml.example
@@ -89,7 +89,7 @@ slow-threshold = 300
 expensive-threshold = 10000
 
 # Maximum query length recorded in log.
-query-log-max-len = 2048
+query-log-max-len = 4096
 
 # File logging.
 [log.file]

diff --git a/tidb-server/main.go b/tidb-server/main.go
@@ -362,7 +362,7 @@ func loadConfig() string {
 // hotReloadConfigItems lists all config items which support hot-reload.
 var hotReloadConfigItems = []string{"Performance.MaxProcs", "Performance.MaxMemory", "Performance.CrossJoin",
 	"Performance.FeedbackProbability", "Performance.QueryFeedbackLimit", "Performance.PseudoEstimateRatio",
-	"OOMUseTmpStorage", "OOMAction", "MemQuotaQuery", "StmtSummary.MaxStmtCount", "StmtSummary.MaxSQLLength"}
+	"OOMUseTmpStorage", "OOMAction", "MemQuotaQuery", "StmtSummary.MaxStmtCount", "StmtSummary.MaxSQLLength", "Log.QueryLogMaxLen"}
 
 func reloadConfig(nc, c *config.Config) {
 	// Just a part of config items need to be reload explicitly.

diff --git a/util/logutil/log.go b/util/logutil/log.go
@@ -44,7 +44,7 @@ const (
 	// DefaultSlowThreshold is the default slow log threshold in millisecond.
 	DefaultSlowThreshold = 300
 	// DefaultQueryLogMaxLen is the default max length of the query in the log.
-	DefaultQueryLogMaxLen = 2048
+	DefaultQueryLogMaxLen = 4096
 )
 
 // EmptyFileLogConfig is an empty FileLogConfig.