diff --git a/executor/analyze_test.go b/executor/analyze_test.go
index 6add0acab4be4..78c50a18308b4 100644
--- a/executor/analyze_test.go
+++ b/executor/analyze_test.go
@@ -150,8 +150,8 @@ func TestAnalyzePartitionTableByConcurrencyInDynamic(t *testing.T) {
 	for _, tc := range testcases {
 		concurrency := tc.concurrency
 		fmt.Println("testcase ", concurrency)
-		tk.MustExec(fmt.Sprintf("set @@tidb_merge_partition_stats_concurrency=%v", concurrency))
-		tk.MustQuery("select @@tidb_merge_partition_stats_concurrency").Check(testkit.Rows(concurrency))
+		tk.MustExec(fmt.Sprintf("set @@global.tidb_merge_partition_stats_concurrency=%v", concurrency))
+		tk.MustQuery("select @@global.tidb_merge_partition_stats_concurrency").Check(testkit.Rows(concurrency))
 		tk.MustExec(fmt.Sprintf("set @@tidb_analyze_partition_concurrency=%v", concurrency))
 		tk.MustQuery("select @@tidb_analyze_partition_concurrency").Check(testkit.Rows(concurrency))
 
diff --git a/statistics/handle/util/util.go b/statistics/handle/util/util.go
index 181f7070129f1..dd581446880ea 100644
--- a/statistics/handle/util/util.go
+++ b/statistics/handle/util/util.go
@@ -135,6 +135,15 @@ func UpdateSCtxVarsForStats(sctx sessionctx.Context) error {
 		return err
 	}
 	sctx.GetSessionVars().SkipMissingPartitionStats = variable.TiDBOptOn(val)
+	verInString, err = sctx.GetSessionVars().GlobalVarsAccessor.GetGlobalSysVar(variable.TiDBMergePartitionStatsConcurrency)
+	if err != nil {
+		return err
+	}
+	ver, err = strconv.ParseInt(verInString, 10, 64)
+	if err != nil {
+		return err
+	}
+	sctx.GetSessionVars().AnalyzePartitionMergeConcurrency = int(ver)
 	return nil
 }