diff --git a/deps/oblib/src/lib/thread/threads.h b/deps/oblib/src/lib/thread/threads.h
index 37822fb47c..e7c3e5b52a 100644
--- a/deps/oblib/src/lib/thread/threads.h
+++ b/deps/oblib/src/lib/thread/threads.h
@@ -117,6 +117,7 @@ protected:
   bool &has_set_stop() { return stop_; }
   int64_t get_thread_count() const { return n_threads_; }
   uint64_t get_thread_idx() const { return thread_idx_; }
+  void set_thread_idx(int64_t idx) { thread_idx_ = idx; }
 
 private:
   virtual void run(int64_t idx);
diff --git a/src/observer/omt/ob_tenant.cpp b/src/observer/omt/ob_tenant.cpp
index 398f6124d0..9011c321d0 100644
--- a/src/observer/omt/ob_tenant.cpp
+++ b/src/observer/omt/ob_tenant.cpp
@@ -47,6 +47,7 @@
 #include "rpc/obrpc/ob_rpc_packet.h"
 #include "lib/container/ob_array.h"
 #include "share/rc/ob_tenant_module_init_ctx.h"
+#include "sql/engine/px/ob_px_worker.h"
 
 using namespace oceanbase::lib;
 using namespace oceanbase::common;
@@ -222,6 +223,14 @@ void ObPxPool::set_px_thread_name()
   lib::set_thread_name_inner(buf);
 }
 
+void ObPxPool::run(int64_t idx)
+{
+  set_thread_idx(idx);
+  // Create worker for current thread.
+  ObPxWorker worker;
+  run1();
+}
+
 void ObPxPool::run1()
 {
   int ret = OB_SUCCESS;
diff --git a/src/observer/omt/ob_tenant.h b/src/observer/omt/ob_tenant.h
index 820cb5b06c..75ec58ea1d 100644
--- a/src/observer/omt/ob_tenant.h
+++ b/src/observer/omt/ob_tenant.h
@@ -55,6 +55,7 @@ class ObPxPool
     : public share::ObThreadPool
 {
   using RunFuncT = std::function<void ()>;
+  void run(int64_t idx) final;
   void run1() final;
   static const int64_t QUEUE_WAIT_TIME = 100 * 1000;
 
diff --git a/src/rootserver/CMakeLists.txt b/src/rootserver/CMakeLists.txt
index 8cb7dde1d6..e855a38ec5 100644
--- a/src/rootserver/CMakeLists.txt
+++ b/src/rootserver/CMakeLists.txt
@@ -110,6 +110,7 @@ ob_set_subtarget(ob_rootserver freeze
   freeze/ob_major_freeze_service.cpp
   freeze/ob_major_freeze_rpc_define.cpp
   freeze/ob_major_freeze_helper.cpp
+  freeze/ob_major_freeze_util.cpp
 )
 
 ob_set_subtarget(ob_rootserver restore
diff --git a/src/rootserver/freeze/ob_checksum_validator.cpp b/src/rootserver/freeze/ob_checksum_validator.cpp
index 48319c2799..a27e85b52f 100644
--- a/src/rootserver/freeze/ob_checksum_validator.cpp
+++ b/src/rootserver/freeze/ob_checksum_validator.cpp
@@ -15,6 +15,7 @@
 #include "rootserver/freeze/ob_checksum_validator.h"
 #include "rootserver/freeze/ob_freeze_info_manager.h"
 #include "rootserver/freeze/ob_zone_merge_manager.h"
+#include "rootserver/freeze/ob_major_freeze_util.h"
 #include "rootserver/ob_root_utils.h"
 #include "lib/mysqlclient/ob_mysql_proxy.h"
 #include "lib/mysqlclient/ob_isql_client.h"
@@ -301,6 +302,7 @@ bool ObIndexChecksumValidator::need_validate() const
 }
 
 int ObIndexChecksumValidator::validate_checksum(
+    const volatile bool &stop,
     const SCN &frozen_scn,
     const hash::ObHashMap<ObTabletLSPair, ObTabletCompactionStatus> &tablet_compaction_map,
     int64_t &table_count,
@@ -308,7 +310,10 @@ int ObIndexChecksumValidator::validate_checksum(
     const int64_t expected_epoch)
 {
   int ret = OB_SUCCESS;
-  if ((!frozen_scn.is_valid()) || (tablet_compaction_map.empty())) {
+  if (stop) {
+    ret = OB_CANCELED;
+    LOG_WARN("already stop", KR(ret), K_(tenant_id));
+  } else if ((!frozen_scn.is_valid()) || (tablet_compaction_map.empty())) {
     ret = OB_INVALID_ARGUMENT;
     LOG_WARN("invalid argument", KR(ret), K_(tenant_id), K(frozen_scn));
   } else if (IS_NOT_INIT) {
@@ -317,14 +322,15 @@ int ObIndexChecksumValidator::validate_checksum(
   } else if (!is_primary_cluster()) {
     ret = OB_INNER_STAT_ERROR;
     LOG_WARN("can only check index column checksum in primary cluster", KR(ret));
-  } else if (OB_FAIL(check_all_table_verification_finished(frozen_scn, tablet_compaction_map, table_count,
-      table_compaction_map, expected_epoch))) {
+  } else if (OB_FAIL(check_all_table_verification_finished(stop, frozen_scn, tablet_compaction_map,
+               table_count, table_compaction_map, expected_epoch))) {
     LOG_WARN("fail to check all table verification finished", KR(ret), K_(tenant_id), K(frozen_scn));
   }
   return ret;
 }
 
 int ObIndexChecksumValidator::check_all_table_verification_finished(
+    const volatile bool &stop,
     const SCN &frozen_scn,
     const hash::ObHashMap<ObTabletLSPair, ObTabletCompactionStatus> &tablet_compaction_map,
     int64_t &table_count,
@@ -338,13 +344,16 @@ int ObIndexChecksumValidator::check_all_table_verification_finished(
   ObSchemaGetterGuard schema_guard;
   SMART_VARS_2((ObArray<const ObSimpleTableSchemaV2 *>, table_schemas),
                (ObArray<uint64_t>, table_ids)) {
-    if (OB_FAIL(ObMultiVersionSchemaService::get_instance().get_tenant_full_schema_guard(tenant_id_, schema_guard))) {
+    if (stop) {
+      ret = OB_CANCELED;
+      LOG_WARN("already stop", KR(ret), K_(tenant_id));
+    } else if (OB_FAIL(ObMultiVersionSchemaService::get_instance().get_tenant_full_schema_guard(tenant_id_, schema_guard))) {
       LOG_WARN("fail to get tenant schema guard", KR(ret), K_(tenant_id));
     } else if (OB_FAIL(schema_guard.get_table_schemas_in_tenant(tenant_id_, table_schemas))) {
       LOG_WARN("fail to get tenant table schemas", KR(ret), K_(tenant_id));
     } else {
       table_count = table_schemas.count();
-      for (int64_t i = 0; (i < table_schemas.count()) && OB_SUCC(ret); ++i) {
+      for (int64_t i = 0; (i < table_schemas.count()) && OB_SUCC(ret) && !stop; ++i) {
         const ObSimpleTableSchemaV2 *simple_schema = table_schemas.at(i);
         if (OB_ISNULL(simple_schema)) {
           ret = OB_ERR_UNEXPECTED;
@@ -423,6 +432,7 @@ int ObIndexChecksumValidator::check_all_table_verification_finished(
                       }
                   #endif
                   // both tables' all tablets finished compaction, we should validate column checksum.
+                  FREEZE_TIME_GUARD;
                   if (OB_FAIL(ObTabletReplicaChecksumOperator::check_column_checksum(tenant_id_,
                       *data_table_schema, *table_schema, frozen_scn, *sql_proxy_, expected_epoch))) {
                     if (OB_CHECKSUM_ERROR == ret) {
@@ -488,7 +498,7 @@ int ObIndexChecksumValidator::check_all_table_verification_finished(
       if (OB_SUCC(ret) && (OB_SUCCESS == check_ret)) {
         ObArray<uint64_t> removed_table_ids; // record the table_id which will be removed
         hash::ObHashMap<uint64_t, ObTableCompactionInfo>::iterator iter = table_compaction_map.begin();
-        for (;OB_SUCC(ret) && (iter != table_compaction_map.end()); ++iter) {
+        for (;!stop && OB_SUCC(ret) && (iter != table_compaction_map.end()); ++iter) {
           const uint64_t cur_table_id = iter->first;
           if (exist_in_table_array(cur_table_id, table_ids)) {
             const ObTableCompactionInfo &compaction_info = iter->second;
@@ -518,7 +528,6 @@ int ObIndexChecksumValidator::check_all_table_verification_finished(
   if (check_ret == OB_CHECKSUM_ERROR) {
     ret = check_ret;
   }
-
   return ret;
 }
 
@@ -591,6 +600,7 @@ int ObIndexChecksumValidator::handle_table_compaction_finished(
     } else {
       if (table_schema->has_tablet()) {
         SMART_VAR(ObArray<ObTabletLSPair>, pairs) {
+          FREEZE_TIME_GUARD;
           if (OB_FAIL(ObTabletReplicaChecksumOperator::get_tablet_ls_pairs(tenant_id_, *table_schema, *sql_proxy_, pairs))) {
             LOG_WARN("fail to get tablet_ls pairs", KR(ret), K_(tenant_id), K(table_id));
           } else if (pairs.count() < 1) {
@@ -649,6 +659,7 @@ int ObIndexChecksumValidator::check_table_compaction_finished(
     SMART_VAR(ObArray<ObTabletID>, tablet_ids) {
       SMART_VAR(ObArray<ObTabletLSPair>, pairs) {
         if (table_schema.has_tablet()) {
+          FREEZE_TIME_GUARD;
           if (OB_FAIL(table_schema.get_tablet_ids(tablet_ids))) {
             LOG_WARN("fail to get tablet_ids from table schema", KR(ret), K(table_schema));
           } else if (OB_FAIL(ObTabletReplicaChecksumOperator::get_tablet_ls_pairs(tenant_id_, table_id,
@@ -689,6 +700,7 @@ int ObIndexChecksumValidator::check_table_compaction_finished(
             }
             // if current table 'has tablet' & 'finished compaction' & 'not skip verifying', verify tablet replica checksum
             if (OB_SUCC(ret) && latest_compaction_info.is_compacted()) {
+              FREEZE_TIME_GUARD;
               if (OB_FAIL(ObTabletReplicaChecksumOperator::check_tablet_replica_checksum(tenant_id_, pairs, frozen_scn,
                   *sql_proxy_))) {
                 if (OB_CHECKSUM_ERROR == ret) {
diff --git a/src/rootserver/freeze/ob_checksum_validator.h b/src/rootserver/freeze/ob_checksum_validator.h
index faa2a42e20..4d871f2944 100644
--- a/src/rootserver/freeze/ob_checksum_validator.h
+++ b/src/rootserver/freeze/ob_checksum_validator.h
@@ -104,7 +104,8 @@ public:
   virtual ~ObIndexChecksumValidator() {}
 
 public:
-  int validate_checksum(const share::SCN &frozen_scn,
+  int validate_checksum(const volatile bool &stop,
+                        const share::SCN &frozen_scn,
                         const hash::ObHashMap<share::ObTabletLSPair, share::ObTabletCompactionStatus> &tablet_compaction_map,
                         int64_t &table_count,
                         hash::ObHashMap<uint64_t, share::ObTableCompactionInfo> &table_compaction_map,
@@ -113,7 +114,8 @@ public:
 
 private:
   // valid '<data table, index table>' pair should finish index column checksum verification, other tables just skip verification.
-  int check_all_table_verification_finished(const share::SCN &frozen_scn,
+  int check_all_table_verification_finished(const volatile bool &stop,
+                                            const share::SCN &frozen_scn,
                                             const hash::ObHashMap<share::ObTabletLSPair, share::ObTabletCompactionStatus> &tablet_compaction_map,
                                             int64_t &table_count,
                                             hash::ObHashMap<uint64_t, share::ObTableCompactionInfo> &table_compaction_map,
diff --git a/src/rootserver/freeze/ob_major_freeze_service.cpp b/src/rootserver/freeze/ob_major_freeze_service.cpp
index 26af501cde..e49beaaa22 100644
--- a/src/rootserver/freeze/ob_major_freeze_service.cpp
+++ b/src/rootserver/freeze/ob_major_freeze_service.cpp
@@ -243,35 +243,44 @@ int ObMajorFreezeService::check_inner_stat()
 
 void ObMajorFreezeService::stop()
 {
+  LOG_INFO("major_freeze_service start to stop", K_(tenant_id));
   ObRecursiveMutexGuard guard(lock_);
   SpinRLockGuard r_guard(rw_lock_);
   if (OB_NOT_NULL(tenant_major_freeze_)) {
+    LOG_INFO("tenant_major_freeze_ start to stop", K_(tenant_id));
     tenant_major_freeze_->stop();
   }
+  LOG_INFO("major_freeze_service finish to stop", K_(tenant_id));
 }
 
 void ObMajorFreezeService::wait()
 {
+  LOG_INFO("major_freeze_service start to wait", K_(tenant_id));
   ObRecursiveMutexGuard guard(lock_);
   SpinRLockGuard r_guard(rw_lock_);
   int ret = OB_SUCCESS;
   if (OB_NOT_NULL(tenant_major_freeze_)) {
+    LOG_INFO("tenant_major_freeze_ start to wait", K_(tenant_id));
     if (OB_FAIL(tenant_major_freeze_->wait())) {
       LOG_WARN("fail to wait", KR(ret), K_(tenant_id));
     }
   }
+  LOG_INFO("major_freeze_service finish to wait", K_(tenant_id));
 }
 
 void ObMajorFreezeService::destroy()
 {
+  LOG_INFO("major_freeze_service start to destroy", K_(tenant_id));
   ObRecursiveMutexGuard guard(lock_);
   SpinRLockGuard r_guard(rw_lock_);
   int ret = OB_SUCCESS;
   if (OB_NOT_NULL(tenant_major_freeze_)) {
+    LOG_INFO("tenant_major_freeze_ start to destroy", K_(tenant_id));
     if (OB_FAIL(tenant_major_freeze_->destroy())) {
       LOG_WARN("fail to destroy", KR(ret), K_(tenant_id));
     }
   }
+  LOG_INFO("major_freeze_service finish to destroy", K_(tenant_id));
 }
 
 int ObMajorFreezeService::mtl_init(ObMajorFreezeService *&service)
diff --git a/src/rootserver/freeze/ob_major_freeze_util.cpp b/src/rootserver/freeze/ob_major_freeze_util.cpp
new file mode 100644
index 0000000000..95169095c5
--- /dev/null
+++ b/src/rootserver/freeze/ob_major_freeze_util.cpp
@@ -0,0 +1,57 @@
+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#define USING_LOG_PREFIX RS
+
+#include "rootserver/freeze/ob_major_freeze_util.h"
+
+#include "lib/time/ob_time_utility.h"
+#include "share/ob_define.h"
+
+namespace oceanbase
+{
+namespace rootserver
+{
+
+ObFreezeTimeGuard::ObFreezeTimeGuard(
+  const char *file,
+  const int64_t line,
+  const char *func,
+  const char *mod)
+  : warn_threshold_us_(FREEZE_WARN_THRESHOLD_US),
+    start_time_us_(common::ObTimeUtility::fast_current_time()),
+    file_(file),
+    line_(line),
+    func_name_(func),
+    log_mod_(mod)
+{
+}
+
+ObFreezeTimeGuard::~ObFreezeTimeGuard()
+{
+  int64_t now_us = common::ObTimeUtility::fast_current_time();
+  int64_t total_cost_us = now_us - start_time_us_;
+  if (OB_UNLIKELY(total_cost_us >= warn_threshold_us_)) {
+    constexpr int buffer_size = 256;
+    char strbuffer[buffer_size] = { 0 };
+    int n = snprintf(strbuffer, buffer_size, "cost too much time: %s (%s:%ld), ",
+                     func_name_, strrchr(file_, '/') ? (strrchr(file_, '/') + 1) : file_, line_);
+    if (n >= buffer_size) {
+      snprintf(&strbuffer[buffer_size - 6], 6, "..., ");
+    }
+    common::OB_PRINT(log_mod_, OB_LOG_LEVEL_DIRECT(WARN), strbuffer,
+      LOG_KVS(K_(warn_threshold_us), K(total_cost_us), K_(start_time_us), K(now_us)));
+  }
+}
+
+} // end namespace rootserver
+} // end namespace oceanbase
diff --git a/src/rootserver/freeze/ob_major_freeze_util.h b/src/rootserver/freeze/ob_major_freeze_util.h
new file mode 100644
index 0000000000..cf8d6baa1b
--- /dev/null
+++ b/src/rootserver/freeze/ob_major_freeze_util.h
@@ -0,0 +1,50 @@
+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#ifndef OCEANBASE_ROOTSERVER_FREEZE_OB_MAJOR_FREEZE_UTIL_H_
+#define OCEANBASE_ROOTSERVER_FREEZE_OB_MAJOR_FREEZE_UTIL_H_
+
+#include <stdint.h>
+
+namespace oceanbase
+{
+namespace rootserver
+{
+
+#define FREEZE_TIME_GUARD \
+  rootserver::ObFreezeTimeGuard freeze_time_guard(__FILE__, __LINE__, __FUNCTION__, "[RS] ")
+
+class ObFreezeTimeGuard
+{
+public:
+  ObFreezeTimeGuard(const char *file,
+                    const int64_t line,
+                    const char *func,
+                    const char *mod);
+  virtual ~ObFreezeTimeGuard();
+
+private:
+  const int64_t FREEZE_WARN_THRESHOLD_US = 10 * 1000L * 1000L; // 10s
+
+private:
+  const int64_t warn_threshold_us_;
+  const int64_t start_time_us_;
+  const char * const file_;
+  const int64_t line_;
+  const char * const func_name_;
+  const char * const log_mod_;
+};
+
+} // end namespace rootserver
+} // end namespace oceanbase
+
+#endif // OCEANBASE_ROOTSERVER_FREEZE_OB_MAJOR_FREEZE_UTIL_H_
diff --git a/src/rootserver/freeze/ob_major_merge_progress_checker.cpp b/src/rootserver/freeze/ob_major_merge_progress_checker.cpp
index df52ce9cdf..c6b0c1003f 100644
--- a/src/rootserver/freeze/ob_major_merge_progress_checker.cpp
+++ b/src/rootserver/freeze/ob_major_merge_progress_checker.cpp
@@ -14,6 +14,7 @@
 
 #include "rootserver/freeze/ob_major_merge_progress_checker.h"
 #include "rootserver/freeze/ob_zone_merge_manager.h"
+#include "rootserver/freeze/ob_major_freeze_util.h"
 #include "share/schema/ob_schema_getter_guard.h"
 #include "share/tablet/ob_tablet_table_operator.h"
 #include "share/tablet/ob_tablet_table_iterator.h"
@@ -181,8 +182,17 @@ int ObMajorMergeProgressChecker::check_merge_progress(
           LOG_WARN("fail to generate tablet table map", K_(tenant_id), KR(ret));
         } else {
           ObTabletInfo tablet_info;
-          while (!stop && OB_SUCC(ret) && OB_SUCC(iter.next(tablet_info))) {
-            if (!tablet_info.is_valid()) {
+          while (!stop && OB_SUCC(ret)) {
+            {
+              FREEZE_TIME_GUARD;
+              if (OB_FAIL(iter.next(tablet_info))) {
+                if (OB_ITER_END != ret) {
+                  LOG_WARN("fail to get next tablet_info", KR(ret), K_(tenant_id), K(stop));
+                }
+              }
+            }
+            if (OB_FAIL(ret)) {
+            } else if (!tablet_info.is_valid()) {
               ret = OB_ERR_UNEXPECTED;
               LOG_WARN("iterate invalid tablet info", KR(ret), K(tablet_info));
             } else if (OB_FAIL(check_tablet(tablet_info, tablet_map, all_progress, global_broadcast_scn,
@@ -258,10 +268,14 @@ int ObMajorMergeProgressChecker::check_tablet(
     ObLSInfo ls_info;
     int64_t cluster_id = GCONF.cluster_id;
     const ObLSID &ls_id = tablet_info.get_ls_id();
-    if (OB_FAIL(lst_operator_->get(cluster_id, tenant_id_,
-        ls_id, share::ObLSTable::DEFAULT_MODE, ls_info))) {
-      LOG_WARN("fail to get ls info", KR(ret), K_(tenant_id), K(ls_id));
-    } else if (OB_FAIL(check_majority_integrated(schema_guard, tablet_info, ls_info))) {
+    {
+      FREEZE_TIME_GUARD;
+      if (OB_FAIL(lst_operator_->get(cluster_id, tenant_id_,
+          ls_id, share::ObLSTable::DEFAULT_MODE, ls_info))) {
+        LOG_WARN("fail to get ls info", KR(ret), K_(tenant_id), K(ls_id));
+      }
+    }
+    if (FAILEDx(check_majority_integrated(schema_guard, tablet_info, ls_info))) {
       LOG_WARN("fail to check majority integrated", KR(ret), K(tablet_info), K(ls_info));
     } else if (OB_FAIL(check_tablet_compaction_scn(all_progress, global_broadcast_scn, tablet_info, ls_info))) {
       LOG_WARN("fail to check data version", KR(ret), K(tablet_info), K(ls_info));
@@ -458,13 +472,18 @@ int ObMajorMergeProgressChecker::get_associated_replica_num(
 }
 
 int ObMajorMergeProgressChecker::check_verification(
+    const volatile bool &stop,
     const share::SCN &global_broadcast_scn,
     const int64_t expected_epoch)
 {
   int ret = OB_SUCCESS;
-  if (!tablet_compaction_map_.empty()) {
-    if (index_validator_.need_validate() && OB_FAIL(index_validator_.validate_checksum(global_broadcast_scn,
-        tablet_compaction_map_, table_count_, table_compaction_map_, expected_epoch))) {
+  if (stop) {
+    ret = OB_CANCELED;
+    LOG_WARN("already stop", KR(ret), K_(tenant_id));
+  } else if (!tablet_compaction_map_.empty()) {
+    if (index_validator_.need_validate() && OB_FAIL(index_validator_.validate_checksum(stop,
+        global_broadcast_scn, tablet_compaction_map_, table_count_, table_compaction_map_,
+        expected_epoch))) {
       LOG_WARN("fail to validate checksum of index validator", KR(ret), K(global_broadcast_scn),
                K(expected_epoch));
     }
diff --git a/src/rootserver/freeze/ob_major_merge_progress_checker.h b/src/rootserver/freeze/ob_major_merge_progress_checker.h
index 27b69d8c02..109aa880cf 100644
--- a/src/rootserver/freeze/ob_major_merge_progress_checker.h
+++ b/src/rootserver/freeze/ob_major_merge_progress_checker.h
@@ -62,7 +62,8 @@ public:
                            const share::SCN &global_broadcast_scn,
                            share::ObAllZoneMergeProgress &all_progress);
 
-  int check_verification(const share::SCN &global_broadcast_scn,
+  int check_verification(const volatile bool &stop,
+                         const share::SCN &global_broadcast_scn,
                          const int64_t expected_epoch);
 
   // @exist_uncompacted means not all table finished compaction
diff --git a/src/rootserver/freeze/ob_major_merge_scheduler.cpp b/src/rootserver/freeze/ob_major_merge_scheduler.cpp
index 06d1156362..55a37df08a 100644
--- a/src/rootserver/freeze/ob_major_merge_scheduler.cpp
+++ b/src/rootserver/freeze/ob_major_merge_scheduler.cpp
@@ -20,11 +20,13 @@
 #include "rootserver/freeze/ob_freeze_info_manager.h"
 #include "rootserver/ob_rs_event_history_table_operator.h"
 #include "rootserver/freeze/ob_tenant_all_zone_merge_strategy.h"
+#include "rootserver/freeze/ob_major_freeze_util.h"
 #include "lib/container/ob_array.h"
 #include "lib/container/ob_se_array.h"
 #include "lib/container/ob_array_iterator.h"
 #include "lib/container/ob_se_array_iterator.h"
 #include "lib/allocator/page_arena.h"
+#include "lib/profile/ob_trace_id.h"
 #include "share/ob_errno.h"
 #include "share/config/ob_server_config.h"
 #include "share/tablet/ob_tablet_table_iterator.h"
@@ -257,6 +259,7 @@ int ObMajorMergeScheduler::do_before_major_merge(const int64_t expected_epoch)
   int ret = OB_SUCCESS;
   share::SCN global_broadcast_scn;
   global_broadcast_scn.set_min();
+  FREEZE_TIME_GUARD;
 
   if (OB_FAIL(progress_checker_.prepare_handle())) {
     LOG_WARN("fail to do prepare handle of progress checker", KR(ret));
@@ -279,6 +282,7 @@ int ObMajorMergeScheduler::do_one_round_major_merge(const int64_t expected_epoch
     // loop until 'this round major merge finished' or 'epoch changed'
     while (!stop_ && !is_paused()) {
       update_last_run_timestamp();
+      ObCurTraceId::init(GCONF.self_addr_);
       ObZoneArray to_merge_zone;
       // Place is_last_merge_complete() to the head of this while loop.
       // So as to break this loop at once, when the last merge is complete.
@@ -372,7 +376,7 @@ int ObMajorMergeScheduler::schedule_zones_to_merge(
     // set zone merging flag
     if (OB_SUCC(ret)) {
       HEAP_VAR(ObZoneMergeInfo, tmp_info) {
-        FOREACH_CNT_X(zone, to_merge, OB_SUCCESS == ret) {
+        FOREACH_CNT_X(zone, to_merge, (OB_SUCCESS == ret) && !stop_) {
           tmp_info.reset();
           tmp_info.tenant_id_ = tenant_id_;
           tmp_info.zone_ = *zone;
@@ -411,7 +415,7 @@ int ObMajorMergeScheduler::start_zones_merge(const ObZoneArray &to_merge, const
   } else if (OB_FAIL(zone_merge_mgr_->get_global_broadcast_scn(global_broadcast_scn))) {
     LOG_WARN("fail to get_global_broadcast_scn", KR(ret));
   } else {
-    for (int64_t i = 0; OB_SUCC(ret) && (i < to_merge.count()); ++i) {
+    for (int64_t i = 0; !stop_ && OB_SUCC(ret) && (i < to_merge.count()); ++i) {
       HEAP_VAR(ObZoneMergeInfo, tmp_info) {
         tmp_info.tenant_id_ = tenant_id_;
         tmp_info.zone_ = to_merge.at(i);
@@ -458,7 +462,7 @@ int ObMajorMergeScheduler::update_merge_status(const int64_t expected_epoch)
                             "global_broadcast_scn", global_broadcast_scn.get_val_for_inner_table_field(),
                             "service_addr", GCONF.self_addr_);
     }
-  } else if (OB_FAIL(progress_checker_.check_verification(global_broadcast_scn, expected_epoch))) {
+  } else if (OB_FAIL(progress_checker_.check_verification(stop_, global_broadcast_scn, expected_epoch))) {
     LOG_WARN("fail to check verification", KR(ret), K_(tenant_id), K(global_broadcast_scn));
     int64_t time_interval = 10L * 60 * 1000 * 1000;  // record every 10 minutes
     if (TC_REACH_TIME_INTERVAL(time_interval)) {
@@ -496,7 +500,7 @@ int ObMajorMergeScheduler::handle_all_zone_merge(
   } else {
     // 1. check all zone finished compaction
     HEAP_VAR(ObZoneMergeInfo, info) {
-      FOREACH_X(progress, all_progress, OB_SUCC(ret)) {
+      FOREACH_X(progress, all_progress, OB_SUCC(ret) && !stop_) {
         const ObZone &zone = progress->zone_;
         bool merged = false;
         info.reset();
@@ -703,6 +707,7 @@ int ObMajorMergeScheduler::try_update_epoch_and_reload()
         }
         LOG_WARN("fail to update freeze_service_epoch", KR(ret), K(ori_epoch), K(latest_epoch));
       } else {
+        FREEZE_TIME_GUARD;
         if (OB_FAIL(set_epoch(latest_epoch))) {
           LOG_WARN("fail to set epoch", KR(ret), K(latest_epoch));
         } else if (OB_FAIL(zone_merge_mgr_->reload())) {
@@ -735,6 +740,7 @@ int ObMajorMergeScheduler::do_update_freeze_service_epoch(
 {
   int ret = OB_SUCCESS;
   int64_t affected_rows = 0;
+  FREEZE_TIME_GUARD;
   if (OB_FAIL(ObServiceEpochProxy::update_service_epoch(*sql_proxy_, tenant_id_,
       ObServiceEpochProxy::FREEZE_SERVICE_EPOCH, latest_epoch, affected_rows))) {
     LOG_WARN("fail to update freeze_service_epoch", KR(ret), K(latest_epoch), K_(tenant_id));
@@ -750,6 +756,7 @@ int ObMajorMergeScheduler::update_all_tablets_report_scn(
     const uint64_t global_braodcast_scn_val)
 {
   int ret = OB_SUCCESS;
+  FREEZE_TIME_GUARD;
   if (OB_FAIL(ObTabletMetaTableCompactionOperator::batch_update_report_scn(
           tenant_id_,
           global_braodcast_scn_val,
@@ -793,10 +800,13 @@ void ObMajorMergeScheduler::check_merge_interval_time(const bool is_merging)
       ObServerTableOperator st_operator;
       if (OB_FAIL(st_operator.init(sql_proxy_))) {
         LOG_WARN("fail to init server table operator", K(ret), K_(tenant_id));
-      } else if (OB_FAIL(st_operator.get_start_service_time(GCONF.self_addr_, start_service_time))) {
-        LOG_WARN("fail to get start service time", KR(ret), K_(tenant_id));
       } else {
-        total_service_time = now - start_service_time;
+        FREEZE_TIME_GUARD;
+        if (OB_FAIL(st_operator.get_start_service_time(GCONF.self_addr_, start_service_time))) {
+          LOG_WARN("fail to get start service time", KR(ret), K_(tenant_id));
+        } else {
+          total_service_time = now - start_service_time;
+        }
       }
     }
     // In order to avoid LOG_ERROR when the tenant miss daily merge due to the cluster restarted.
diff --git a/src/rootserver/freeze/ob_tenant_major_freeze.cpp b/src/rootserver/freeze/ob_tenant_major_freeze.cpp
index be70f3e352..7e4f87a315 100644
--- a/src/rootserver/freeze/ob_tenant_major_freeze.cpp
+++ b/src/rootserver/freeze/ob_tenant_major_freeze.cpp
@@ -85,16 +85,22 @@ int ObTenantMajorFreeze::start()
 
 void ObTenantMajorFreeze::stop()
 {
+  LOG_INFO("daily_launcher start to stop", K_(tenant_id));
   daily_launcher_.stop();
+  LOG_INFO("freeze_info_detector start to stop", K_(tenant_id));
   freeze_info_detector_.stop();
+  LOG_INFO("merge_scheduler start to stop", K_(tenant_id));
   merge_scheduler_.stop();
 }
 
 int ObTenantMajorFreeze::wait()
 {
   int ret = OB_SUCCESS;
+  LOG_INFO("daily_launcher start to wait", K_(tenant_id));
   daily_launcher_.wait();
+  LOG_INFO("freeze_info_detector start to wait", K_(tenant_id));
   freeze_info_detector_.wait();
+  LOG_INFO("merge_scheduler start to wait", K_(tenant_id));
   merge_scheduler_.wait();
   return ret;
 }
@@ -102,13 +108,22 @@ int ObTenantMajorFreeze::wait()
 int ObTenantMajorFreeze::destroy()
 {
   int ret = OB_SUCCESS;
+  LOG_INFO("daily_launcher start to destroy", K_(tenant_id));
   if (OB_FAIL(daily_launcher_.destroy())) {
     LOG_WARN("fail to destroy daily_launcher", KR(ret), K_(tenant_id));
-  } else if (OB_FAIL(freeze_info_detector_.destroy())) {
-    LOG_WARN("fail to destroy freeze_info_detector", KR(ret), K_(tenant_id));
-  } else if (OB_FAIL(merge_scheduler_.destroy())) {
-    LOG_WARN("fail to destroy merge_scheduler", KR(ret), K_(tenant_id));
-  } 
+  }
+  if (OB_SUCC(ret)) {
+    LOG_INFO("freeze_info_detector start to destroy", K_(tenant_id));
+    if (OB_FAIL(freeze_info_detector_.destroy())) {
+      LOG_WARN("fail to destroy freeze_info_detector", KR(ret), K_(tenant_id));
+    }
+  }
+  if (OB_SUCC(ret)) {
+    LOG_INFO("merge_scheduler start to destroy", K_(tenant_id));
+    if (OB_FAIL(merge_scheduler_.destroy())) {
+      LOG_WARN("fail to destroy merge_scheduler", KR(ret), K_(tenant_id));
+    }
+  }
   return ret;
 }
 
diff --git a/src/rootserver/freeze/ob_zone_merge_manager.cpp b/src/rootserver/freeze/ob_zone_merge_manager.cpp
index 5d7329282c..900232095c 100644
--- a/src/rootserver/freeze/ob_zone_merge_manager.cpp
+++ b/src/rootserver/freeze/ob_zone_merge_manager.cpp
@@ -23,6 +23,7 @@
 #include "lib/mysqlclient/ob_mysql_proxy.h"
 #include "lib/utility/ob_macro_utils.h"
 #include "rootserver/ob_rs_event_history_table_operator.h"
+#include "rootserver/freeze/ob_major_freeze_util.h"
 
 namespace oceanbase
 {
@@ -310,6 +311,7 @@ int ObZoneMergeManagerBase::start_zone_merge(
   ObMySQLTransaction trans;
   const int64_t cur_time = ObTimeUtility::current_time();
   const uint64_t meta_tenant_id = gen_meta_tenant_id(tenant_id_);
+  FREEZE_TIME_GUARD;
 
   if (OB_FAIL(check_valid(zone, idx))) {
     LOG_WARN("fail to check valid", KR(ret), K(zone), K_(tenant_id));
@@ -344,6 +346,7 @@ int ObZoneMergeManagerBase::start_zone_merge(
       tmp_info.broadcast_scn_.set_scn(global_merge_info_.global_broadcast_scn(), need_update);
       tmp_info.frozen_scn_.set_scn(global_merge_info_.frozen_scn(), need_update);
 
+      FREEZE_TIME_GUARD;
       if (OB_FAIL(ObZoneMergeTableOperator::update_partial_zone_merge_info(trans, tenant_id_, tmp_info))) {
         LOG_WARN("fail to update partial zone merge info", KR(ret), K_(tenant_id), K(tmp_info));
       }
@@ -373,6 +376,7 @@ int ObZoneMergeManagerBase::finish_zone_merge(
   ObMySQLTransaction trans;
   const int64_t cur_time = ObTimeUtility::current_time();
   const uint64_t meta_tenant_id = gen_meta_tenant_id(tenant_id_);
+  FREEZE_TIME_GUARD;
 
   if (OB_FAIL(check_valid(zone, idx))) {
     LOG_WARN("fail to check valid", KR(ret), K(zone), K_(tenant_id));
@@ -408,6 +412,7 @@ int ObZoneMergeManagerBase::finish_zone_merge(
         tmp_info.all_merged_scn_.set_scn(new_all_merged_scn, true);
       }
 
+      FREEZE_TIME_GUARD;
       if (OB_FAIL(ObZoneMergeTableOperator::update_partial_zone_merge_info(trans, tenant_id_, tmp_info))) {
         LOG_WARN("fail to update partial zone merge info", KR(ret), K_(tenant_id), K(tmp_info));
       }
@@ -466,6 +471,7 @@ int ObZoneMergeManagerBase::set_merge_error(const int64_t error_type, const int6
       is_merge_error = 0;
     }
 
+    FREEZE_TIME_GUARD;
     if (OB_FAIL(check_inner_stat())) {
       LOG_WARN("fail to check inner stat", KR(ret), K_(tenant_id));
     } else if (OB_FAIL(trans.start(proxy_, meta_tenant_id))) {
@@ -480,6 +486,7 @@ int ObZoneMergeManagerBase::set_merge_error(const int64_t error_type, const int6
         tmp_global_info.is_merge_error_.set_val(is_merge_error, true);
         tmp_global_info.error_type_.set_val(error_type, true);
 
+        FREEZE_TIME_GUARD;
         if (OB_FAIL(ObGlobalMergeTableOperator::update_partial_global_merge_info(trans, tenant_id_, 
             tmp_global_info))) {
           LOG_WARN("fail to update partial global merge info", KR(ret), K(tmp_global_info));
@@ -512,6 +519,7 @@ int ObZoneMergeManagerBase::set_zone_merging(
   int64_t idx = OB_INVALID_INDEX;
   ObMySQLTransaction trans;
   const uint64_t meta_tenant_id = gen_meta_tenant_id(tenant_id_);
+  FREEZE_TIME_GUARD;
   if (OB_FAIL(check_valid(zone, idx))) {
     LOG_WARN("fail to check valid", KR(ret), K(zone), K_(tenant_id));
   } else if (OB_FAIL(trans.start(proxy_, meta_tenant_id))) {
@@ -526,6 +534,7 @@ int ObZoneMergeManagerBase::set_zone_merging(
     } else if (is_merging != zone_merge_infos_[idx].is_merging_.get_value()) {
       tmp_info.is_merging_.set_val(is_merging, true);
 
+      FREEZE_TIME_GUARD;
       if (OB_FAIL(ObZoneMergeTableOperator::update_partial_zone_merge_info(trans, tenant_id_, tmp_info))) {
         LOG_WARN("fail to update partial zone merge info", KR(ret), K_(tenant_id), K(tmp_info));
       }
@@ -668,6 +677,7 @@ int ObZoneMergeManagerBase::generate_next_global_broadcast_scn(
     SCN &next_scn)
 {
   int ret = OB_SUCCESS;
+  FREEZE_TIME_GUARD;
   ObMySQLTransaction trans;
   const uint64_t meta_tenant_id = gen_meta_tenant_id(tenant_id_);
   if (OB_FAIL(check_inner_stat())) {
@@ -713,6 +723,7 @@ int ObZoneMergeManagerBase::generate_next_global_broadcast_scn(
         LOG_INFO("next global_broadcast_scn", K_(tenant_id), K(next_scn), K(tmp_global_info));
         
         tmp_global_info.merge_status_.set_val(ObZoneMergeInfo::MERGE_STATUS_MERGING, true);
+        FREEZE_TIME_GUARD;
         if (OB_FAIL(ObGlobalMergeTableOperator::update_partial_global_merge_info(trans, tenant_id_, 
             tmp_global_info))) {
           LOG_WARN("fail to update partial global merge info", KR(ret), K(tmp_global_info));
@@ -761,6 +772,7 @@ int ObZoneMergeManagerBase::try_update_global_last_merged_scn(const int64_t expe
     }
 
     if (OB_SUCC(ret) && need_update) {
+      FREEZE_TIME_GUARD;
       if (OB_FAIL(trans.start(proxy_, meta_tenant_id))) {
         LOG_WARN("fail to start transaction", KR(ret), K_(tenant_id), K(meta_tenant_id));
       } else if (OB_FAIL(check_freeze_service_epoch(trans, expected_epoch))) {
@@ -776,6 +788,7 @@ int ObZoneMergeManagerBase::try_update_global_last_merged_scn(const int64_t expe
           tmp_global_info.last_merged_scn_.set_scn(global_merge_info_.global_broadcast_scn(), true);
           tmp_global_info.merge_status_.set_val(ObZoneMergeInfo::MERGE_STATUS_IDLE, true);
 
+          FREEZE_TIME_GUARD;
           if (OB_FAIL(ObGlobalMergeTableOperator::update_partial_global_merge_info(trans, tenant_id_, 
               tmp_global_info))) {
             LOG_WARN("fail to update partial global merge info", KR(ret), K(tmp_global_info));
diff --git a/src/sql/engine/px/ob_px_worker.cpp b/src/sql/engine/px/ob_px_worker.cpp
index 5815d94f28..9cec2c06ef 100644
--- a/src/sql/engine/px/ob_px_worker.cpp
+++ b/src/sql/engine/px/ob_px_worker.cpp
@@ -471,3 +471,27 @@ ObPxLocalWorkerFactory::~ObPxLocalWorkerFactory()
 {
   destroy();
 }
+
+
+
+//////////////////////////////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////////////
+int ObPxWorker::check_status()
+{
+  int ret = OB_SUCCESS;
+  if (nullptr != session_) {
+    session_->is_terminate(ret);
+  }
+
+  if (OB_SUCC(ret)) {
+    if (is_timeout()) {
+      ret = OB_TIMEOUT;
+    } else if (IS_INTERRUPTED()) {
+      ObInterruptCode &ic = GET_INTERRUPT_CODE();
+      ret = ic.code_;
+      LOG_WARN("px execution was interrupted", K(ic), K(ret));
+    }
+  }
+  return ret;
+}
diff --git a/src/sql/engine/px/ob_px_worker.h b/src/sql/engine/px/ob_px_worker.h
index abe86b2564..f252467d40 100644
--- a/src/sql/engine/px/ob_px_worker.h
+++ b/src/sql/engine/px/ob_px_worker.h
@@ -226,6 +226,12 @@ public:
   }
 };
 
+class ObPxWorker : public lib::Worker
+{
+public:
+  virtual int check_status() override;
+};
+
 }
 }
 #endif /* __OB_SQL_ENGINE_PX_WORKER_RUNNABLE_H__ */
diff --git a/src/storage/access/ob_index_tree_prefetcher.cpp b/src/storage/access/ob_index_tree_prefetcher.cpp
index 161ed548b4..01db056a26 100644
--- a/src/storage/access/ob_index_tree_prefetcher.cpp
+++ b/src/storage/access/ob_index_tree_prefetcher.cpp
@@ -539,7 +539,6 @@ int ObIndexTreeMultiPrefetcher::multi_prefetch()
         int64_t tenant_id = MTL_ID();
         ObMicroIndexInfo &cur_index_info = read_handle.index_block_info_;
         ObMicroBlockDataHandle &next_handle = read_handle.get_read_handle();
-        ObMicroBlockDataHandle tmp_handle;
         if (OB_UNLIKELY(!cur_index_info.is_valid() ||
             nullptr == read_handle.micro_handle_ ||
             &next_handle == read_handle.micro_handle_ ||
@@ -550,7 +549,7 @@ int ObIndexTreeMultiPrefetcher::multi_prefetch()
                     tenant_id,
                     cur_index_info,
                     cur_index_info.is_data_block(),
-                    tmp_handle))) {
+                    next_handle))) {
           //not in cache yet, stop this rowkey prefetching if it's not the rowkey to be feteched
           ret = OB_SUCCESS;
           if (is_rowkey_to_fetched) {
@@ -560,13 +559,9 @@ int ObIndexTreeMultiPrefetcher::multi_prefetch()
           } else {
             stop_prefetch = true;
           }
-        } else {
-          // already in block cache, get block data
-          read_handle.micro_handle_->reset();
-          *read_handle.micro_handle_ = tmp_handle;
-          if (OB_FAIL(read_handle.micro_handle_->get_cached_index_block_data(*index_read_info_, index_block_))) {
-            LOG_WARN("Fail to get cached index block data", K(ret), KPC(read_handle.micro_handle_));
-          }
+        } else if (FALSE_IT(read_handle.set_cur_micro_handle(next_handle))) {
+        } else if (OB_FAIL(read_handle.micro_handle_->get_cached_index_block_data(*index_read_info_, index_block_))) {
+          LOG_WARN("Fail to get cached index block data", K(ret), KPC(read_handle.micro_handle_));
         }
         if (OB_SUCC(ret) && !stop_prefetch) {
           if (OB_FAIL(drill_down(cur_index_info.get_macro_id(), read_handle, cur_index_info.is_leaf_block(), is_rowkey_to_fetched))) {
diff --git a/src/storage/access/ob_index_tree_prefetcher.h b/src/storage/access/ob_index_tree_prefetcher.h
index 86632e6020..9c104c5f3f 100644
--- a/src/storage/access/ob_index_tree_prefetcher.h
+++ b/src/storage/access/ob_index_tree_prefetcher.h
@@ -221,13 +221,13 @@ public:
       cur_prefetch_end_ = false;
       index_block_info_.reset();
       micro_handle_idx_ = 0;
-      for (int64_t i = 0; i < DEFAULT_GET_MICRO_DATA_HANDLE_CNT; ++i) {
+      for (int64_t i = 0; i < DEFAULT_MULTIGET_MICRO_DATA_HANDLE_CNT; ++i) {
         micro_handles_[i].reset();
       }
     }
     OB_INLINE ObMicroBlockDataHandle& get_read_handle()
     {
-      return micro_handles_[micro_handle_idx_ % DEFAULT_GET_MICRO_DATA_HANDLE_CNT];
+      return micro_handles_[micro_handle_idx_ % DEFAULT_MULTIGET_MICRO_DATA_HANDLE_CNT];
     }
     OB_INLINE void set_cur_micro_handle(ObMicroBlockDataHandle &handle)
     {
@@ -236,11 +236,13 @@ public:
     }
     INHERIT_TO_STRING_KV("ObSSTableReadHandle", ObSSTableReadHandle, KPC_(rowkey),
         K_(cur_level), K_(cur_prefetch_end), K_(index_block_info), K_(micro_handle_idx), K_(micro_handles));
+    // TODO(yht146439) change to 2
+    static const int64_t DEFAULT_MULTIGET_MICRO_DATA_HANDLE_CNT = 3;
     int16_t cur_level_;
     bool cur_prefetch_end_;
     ObMicroIndexInfo index_block_info_;
     int64_t micro_handle_idx_;
-    ObMicroBlockDataHandle micro_handles_[DEFAULT_GET_MICRO_DATA_HANDLE_CNT];
+    ObMicroBlockDataHandle micro_handles_[DEFAULT_MULTIGET_MICRO_DATA_HANDLE_CNT];
   };
   typedef ObReallocatedFixedArray<ObSSTableReadHandleExt> ReadHandleExtArray;
   ObIndexTreeMultiPrefetcher() :