*: recalculate the threshold of gctuner when ServerMemoryLimit is updated (#51197) (#51214)

ti-chi-bot · web-flow · commit e33ccdcaaca8 · 2024-02-21T08:43:56.000Z
close #48180
diff --git a/sessionctx/variable/sysvar.go b/sessionctx/variable/sysvar.go
@@ -940,6 +940,8 @@ var defaultSysVars = []*SysVar{
 			}
 			memory.ServerMemoryLimitOriginText.Store(str)
 			memory.ServerMemoryLimit.Store(bt)
+			threshold := float64(bt) * GOGCTunerThreshold.Load()
+			gctuner.Tuning(uint64(threshold))
 			gctuner.GlobalMemoryLimitTuner.UpdateMemoryLimit()
 			return nil
 		},

Original file line number	Diff line number	Diff line change
`@@ -940,6 +940,8 @@ var defaultSysVars = []*SysVar{`
`940`	`940`	`}`
`941`	`941`	`memory.ServerMemoryLimitOriginText.Store(str)`
`942`	`942`	`memory.ServerMemoryLimit.Store(bt)`
	`943`	`+ threshold := float64(bt) * GOGCTunerThreshold.Load()`
	`944`	`+ gctuner.Tuning(uint64(threshold))`
`943`	`945`	`gctuner.GlobalMemoryLimitTuner.UpdateMemoryLimit()`
`944`	`946`	`return nil`
`945`	`947`	`},`