diff --git a/deps/oblib/src/lib/signal/ob_signal_handlers.cpp b/deps/oblib/src/lib/signal/ob_signal_handlers.cpp
index e3f00d43f4..fcb1b529f3 100644
--- a/deps/oblib/src/lib/signal/ob_signal_handlers.cpp
+++ b/deps/oblib/src/lib/signal/ob_signal_handlers.cpp
@@ -31,6 +31,9 @@ namespace oceanbase
 {
 namespace common
 {
+
+int64_t FASTSTACK_MIN_INTERVAL = 30 * 60 * 1000 * 1000; // 30min
+
 static const int SIG_SET[] = {SIGABRT, SIGBUS, SIGFPE, SIGSEGV, SIGURG};
 static constexpr char MINICORE_SHELL_PATH[] = "tools/minicore.sh";
 static constexpr char FASTSTACK_SHELL_PATH[] = "tools/callstack.sh";
@@ -261,12 +264,11 @@ int minicoredump(int sig, int64_t tid, pid_t& pid)
 
 int faststack()
 {
-  static constexpr int64_t MIN_INTERVAL = 30 * 60 * 1000 * 1000; // 30min
   static int64_t last_ts = 0;
   int64_t now = ObTimeUtility::fast_current_time();
   int64_t last = ATOMIC_LOAD(&last_ts);
   int ret = OB_SUCCESS;
-  if (now - last < MIN_INTERVAL) {
+  if (now - last < FASTSTACK_MIN_INTERVAL) {
     ret = OB_EAGAIN;
   } else if (!ATOMIC_BCAS(&last_ts, last, now)) {
     ret = OB_EAGAIN;
diff --git a/src/observer/omt/ob_tenant.cpp b/src/observer/omt/ob_tenant.cpp
index 7f08b00862..4ed2208f7b 100644
--- a/src/observer/omt/ob_tenant.cpp
+++ b/src/observer/omt/ob_tenant.cpp
@@ -66,6 +66,8 @@ using namespace oceanbase::obrpc;
 #define EXPAND_INTERVAL (1 * 1000 * 1000)
 #define SHRINK_INTERVAL (1 * 1000 * 1000)
 
+int64_t FASTSTACK_REQ_QUEUE_SIZE_THRESHOLD = INT64_MAX;
+
 extern "C" {
 int ob_pthread_create(void **ptr, void *(*start_routine) (void *), void *arg);
 int ob_pthread_tryjoin_np(void *ptr);
@@ -1344,7 +1346,7 @@ int ObTenant::recv_request(ObRequest &req)
   if (OB_SUCC(ret)) {
     ObTenantStatEstGuard guard(id_);
     EVENT_INC(REQUEST_ENQUEUE_COUNT);
-  } else if (OB_SIZE_OVERFLOW == ret) {
+  } else if (OB_SIZE_OVERFLOW == ret || req_queue_.size() >= FASTSTACK_REQ_QUEUE_SIZE_THRESHOLD) {
     IGNORE_RETURN faststack();
   }