diff --git a/pkg/sessionctx/variable/tidb_vars.go b/pkg/sessionctx/variable/tidb_vars.go
index da7dc29765ab6..c7a50824b9045 100644
--- a/pkg/sessionctx/variable/tidb_vars.go
+++ b/pkg/sessionctx/variable/tidb_vars.go
@@ -1130,7 +1130,7 @@ const (
 	DefIndexJoinBatchSize                          = 25000
 	DefIndexLookupSize                             = 20000
 	DefDistSQLScanConcurrency                      = 15
-	DefBuildStatsConcurrency                       = 4
+	DefBuildStatsConcurrency                       = 2
 	DefBuildSamplingStatsConcurrency               = 2
 	DefAutoAnalyzeRatio                            = 0.5
 	DefAutoAnalyzeStartTime                        = "00:00 +0000"