diff --git a/scheduler/config/constants.go b/scheduler/config/constants.go
index 7bf47a5425f..126fd8e0800 100644
--- a/scheduler/config/constants.go
+++ b/scheduler/config/constants.go
@@ -37,7 +37,7 @@ const (
 	DefaultSchedulerCandidateParentLimit = 4
 
 	// DefaultSchedulerFilterParentLimit is default limit the number for filter parent.
-	DefaultSchedulerFilterParentLimit = 40
+	DefaultSchedulerFilterParentLimit = 15
 )
 
 const (
diff --git a/scheduler/resource/task.go b/scheduler/resource/task.go
index 58e6460d838..7f419bc1dae 100644
--- a/scheduler/resource/task.go
+++ b/scheduler/resource/task.go
@@ -50,7 +50,7 @@ const (
 	FailedPeerCountLimit = 200
 
 	// Peer count limit for task.
-	PeerCountLimitForTask = 700
+	PeerCountLimitForTask = 500
 )
 
 const (