diff --git a/util/gctuner/memory_limit_tuner.go b/util/gctuner/memory_limit_tuner.go
index 29804393a7f1f..4d7ed50015da3 100644
--- a/util/gctuner/memory_limit_tuner.go
+++ b/util/gctuner/memory_limit_tuner.go
@@ -104,10 +104,7 @@ func (t *memoryLimitTuner) GetPercentage() float64 {
 // UpdateMemoryLimit updates the memory limit.
 // This function should be called when `tidb_server_memory_limit` or `tidb_server_memory_limit_gc_trigger` is modified.
 func (t *memoryLimitTuner) UpdateMemoryLimit() {
-	var memoryLimit int64 = math.MaxInt64
-	if !EnableGOGCTuner.Load() {
-		memoryLimit = t.calcMemoryLimit()
-	}
+	var memoryLimit = t.calcMemoryLimit()
 	if memoryLimit == math.MaxInt64 {
 		t.isTuning.Store(false)
 	} else {