diff --git a/src/gausskernel/storage/lmgr/proc.cpp b/src/gausskernel/storage/lmgr/proc.cpp
index 8247a230a..8611e39ed 100755
--- a/src/gausskernel/storage/lmgr/proc.cpp
+++ b/src/gausskernel/storage/lmgr/proc.cpp
@@ -3198,14 +3198,14 @@ TimestampTz GetStatementFinTime()
 
 AlarmCheckResult ConnectionOverloadChecker(Alarm* alarm, AlarmAdditionalParam* additionalParam)
 {
-#ifdef PGXC
+#ifdef ENABLE_MULTIPLE_NODES
     if (!IS_PGXC_COORDINATOR) {
         return ALM_ACR_UnKnown;
     }
 #endif
 
     int connectionLimit =
-        int(u_sess->attr.attr_common.ConnectionAlarmRate * g_instance.shmem_cxt.MaxConnections);
+        int(u_sess->attr.attr_common.ConnectionAlarmRate * g_instance.attr.attr_network.MaxConnections);
     SpinLockAcquire(&g_instance.conn_cxt.ConnCountLock);
     int currentConnections = g_instance.conn_cxt.CurConnCount;
     SpinLockRelease(&g_instance.conn_cxt.ConnCountLock);
diff --git a/src/test/regress/pg_regress.cpp b/src/test/regress/pg_regress.cpp
index 057558488..db1f0b4ac 100644
--- a/src/test/regress/pg_regress.cpp
+++ b/src/test/regress/pg_regress.cpp
@@ -5461,7 +5461,7 @@ static void check_global_variables()
     }
 }
 
-#define BASE_PGXC_LIKE_MACRO_NUM 1393
+#define BASE_PGXC_LIKE_MACRO_NUM 1392
 static void check_pgxc_like_macros()
 {
 #ifdef BUILD_BY_CMAKE