diff --git a/src/pl/sys_package/ob_dbms_limit_calculator_mysql.cpp b/src/pl/sys_package/ob_dbms_limit_calculator_mysql.cpp
index 7a4cff27ab..18b0a03699 100644
--- a/src/pl/sys_package/ob_dbms_limit_calculator_mysql.cpp
+++ b/src/pl/sys_package/ob_dbms_limit_calculator_mysql.cpp
@@ -16,6 +16,7 @@
 #include "lib/utility/ob_macro_utils.h"
 #include "lib/utility/utility.h"
 #include "share/inner_table/ob_inner_table_schema_constants.h"
+#include "share/ob_all_server_tracer.h"
 #include "share/resource_limit_calculator/ob_resource_limit_calculator.h"
 #include "share/ob_unit_table_operator.h"
 #include "share/ob_all_server_tracer.h"
@@ -91,6 +92,7 @@ int ObDBMSLimitCalculator::phy_res_calculate_by_unit(
   char* ptr = NULL;
   int64_t pos = 0;
   int64_t timeout = -1;
+  bool is_active = false;
   const int64_t curr_tenant_id = MTL_ID();
   if (!is_sys_tenant(curr_tenant_id)) {
     ret = OB_OP_NOT_ALLOW;
@@ -103,6 +105,18 @@ int ObDBMSLimitCalculator::phy_res_calculate_by_unit(
   } else if (FALSE_IT(addr_str = params.at(1).get_varchar())) {
   } else if (OB_FAIL(addr.parse_from_string(addr_str))) {
     LOG_WARN("parse address failed", K(ret), K(addr_str));
+  } else if (OB_FAIL(SVR_TRACER.check_server_alive(addr, is_active))) {
+    LOG_WARN("check server active failed", K(ret), K(addr));
+    if (OB_ENTRY_NOT_EXIST == ret) {
+      is_active = false;
+      ret = OB_SUCCESS;
+    }
+  }
+  if (OB_FAIL(ret)) {
+  } else if (!is_active) {
+    ret = OB_INVALID_ARGUMENT;
+    LOG_USER_ERROR(OB_INVALID_ARGUMENT, "calculate physical resource needed by unit. "
+                                        "The observer is not active or not in cluster.");
   } else if (OB_ISNULL(ptr = static_cast<char *>(ctx.get_allocator().alloc(MAX_RES_LEN)))) {
     ret = OB_ALLOCATE_MEMORY_FAILED;
     LOG_WARN("allocate memory failed", K(ret), K(MAX_RES_LEN));