diff --git a/tools/upgrade/do_upgrade_post.py b/tools/upgrade/do_upgrade_post.py
index 53bda07e26..bb738ee5ab 100755
--- a/tools/upgrade/do_upgrade_post.py
+++ b/tools/upgrade/do_upgrade_post.py
@@ -74,7 +74,7 @@ def do_upgrade(my_host, my_port, my_user, my_passwd, timeout, my_module_set, upg
 
       if run_modules.MODULE_HEALTH_CHECK in my_module_set:
         logging.info('================begin to run health check action ===============')
-        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout)
+        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, False)  # need_check_major_status = False
         logging.info('================succeed to run health check action ===============')
 
       if run_modules.MODULE_END_ROLLING_UPGRADE in my_module_set:
diff --git a/tools/upgrade/do_upgrade_pre.py b/tools/upgrade/do_upgrade_pre.py
index 4ab86e18c8..8b8bd60294 100755
--- a/tools/upgrade/do_upgrade_pre.py
+++ b/tools/upgrade/do_upgrade_pre.py
@@ -96,7 +96,7 @@ def do_upgrade(my_host, my_port, my_user, my_passwd, timeout, my_module_set, upg
 
       if run_modules.MODULE_HEALTH_CHECK in my_module_set:
         logging.info('================begin to run health check action ===============')
-        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout)
+        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, True) # need_check_major_status = True
         logging.info('================succeed to run health check action ===============')
 
     except Exception, e:
diff --git a/tools/upgrade/special_upgrade_action_pre.py b/tools/upgrade/special_upgrade_action_pre.py
index 1cd519e6dd..d8e68be6c9 100755
--- a/tools/upgrade/special_upgrade_action_pre.py
+++ b/tools/upgrade/special_upgrade_action_pre.py
@@ -28,6 +28,14 @@ def do_special_upgrade(conn, cur, timeout, user, passwd):
   # when upgrade across version, disable enable_ddl/major_freeze
   if current_version != target_version:
     actions.set_parameter(cur, 'enable_ddl', 'False', timeout)
+    actions.set_parameter(cur, 'enable_major_freeze', 'False', timeout)
+    actions.set_tenant_parameter(cur, '_enable_adaptive_compaction', 'False', timeout)
+    # wait scheduler in storage to notice adaptive_compaction is switched to false
+    time.sleep(60 * 2)
+    query_cur = actions.QueryCursor(cur)
+    wait_major_timeout = 600
+    upgrade_health_checker.check_major_merge(query_cur, wait_major_timeout)
+    actions.do_suspend_merge(cur, timeout)
   # When upgrading from a version prior to 4.2 to version 4.2, the bloom_filter should be disabled.
   # The param _bloom_filter_enabled is no longer in use as of version 4.2, there is no need to enable it again.
   if actions.get_version(current_version) < actions.get_version('4.2.0.0')\
diff --git a/tools/upgrade/upgrade_checker.py b/tools/upgrade/upgrade_checker.py
index f2366634c8..31332086c6 100755
--- a/tools/upgrade/upgrade_checker.py
+++ b/tools/upgrade/upgrade_checker.py
@@ -411,6 +411,9 @@ def check_cluster_status(query_cur):
   (desc, results) = query_cur.exec_query("""select count(1) from CDB_OB_MAJOR_COMPACTION where (GLOBAL_BROADCAST_SCN > LAST_SCN or STATUS != 'IDLE')""")
   if results[0][0] > 0 :
     fail_list.append('{0} tenant is merging, please check'.format(results[0][0]))
+  (desc, results) = query_cur.exec_query("""select /*+ query_timeout(1000000000) */ count(1) from __all_virtual_tablet_compaction_info where max_received_scn > finished_scn and max_received_scn > 0""")
+  if results[0][0] > 0 :
+    fail_list.append('{0} tablet is merging, please check'.format(results[0][0]))
   logging.info('check cluster status success')
 
 # 5. 检查是否有异常租户(creating，延迟删除，恢复中)
diff --git a/tools/upgrade/upgrade_health_checker.py b/tools/upgrade/upgrade_health_checker.py
index 1c84427722..1c41fa068d 100755
--- a/tools/upgrade/upgrade_health_checker.py
+++ b/tools/upgrade/upgrade_health_checker.py
@@ -393,7 +393,7 @@ def check_until_timeout(query_cur, sql, value, timeout):
     time.sleep(10)
 
 # 开始健康检查
-def do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, zone = ''):
+def do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, need_check_major_status, zone = ''):
   try:
     conn = mysql.connector.connect(user = my_user,
                                    password = my_passwd,
@@ -410,6 +410,8 @@ def do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, zone
       check_paxos_replica(query_cur, timeout)
       check_schema_status(query_cur, timeout)
       check_server_version_by_zone(query_cur, zone)
+      if True == need_check_major_status:
+        check_major_merge(query_cur, timeout)
     except Exception, e:
       logging.exception('run error')
       raise e
@@ -444,7 +446,7 @@ if __name__ == '__main__':
       zone = get_opt_zone()
       logging.info('parameters from cmd: host=\"%s\", port=%s, user=\"%s\", password=\"%s\", log-file=\"%s\", timeout=%s, zone=\"%s\"', \
           host, port, user, password.replace('"', '\\"'), log_filename, timeout, zone)
-      do_check(host, port, user, password, upgrade_params, timeout, zone)
+      do_check(host, port, user, password, upgrade_params, timeout, False, zone) # need_check_major_status = False
     except mysql.connector.Error, e:
       logging.exception('mysql connctor error')
       raise e
diff --git a/tools/upgrade/upgrade_post.py b/tools/upgrade/upgrade_post.py
index cd85639744..a17c1673bc 100755
--- a/tools/upgrade/upgrade_post.py
+++ b/tools/upgrade/upgrade_post.py
@@ -674,7 +674,7 @@
 #
 #      if run_modules.MODULE_HEALTH_CHECK in my_module_set:
 #        logging.info('================begin to run health check action ===============')
-#        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout)
+#        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, False)  # need_check_major_status = False
 #        logging.info('================succeed to run health check action ===============')
 #
 #      if run_modules.MODULE_END_ROLLING_UPGRADE in my_module_set:
@@ -869,7 +869,7 @@
 #
 #      if run_modules.MODULE_HEALTH_CHECK in my_module_set:
 #        logging.info('================begin to run health check action ===============')
-#        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout)
+#        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, True) # need_check_major_status = True
 #        logging.info('================succeed to run health check action ===============')
 #
 #    except Exception, e:
@@ -1355,6 +1355,14 @@
 #  # when upgrade across version, disable enable_ddl/major_freeze
 #  if current_version != target_version:
 #    actions.set_parameter(cur, 'enable_ddl', 'False', timeout)
+#    actions.set_parameter(cur, 'enable_major_freeze', 'False', timeout)
+#    actions.set_tenant_parameter(cur, '_enable_adaptive_compaction', 'False', timeout)
+#    # wait scheduler in storage to notice adaptive_compaction is switched to false
+#    time.sleep(60 * 2)
+#    query_cur = actions.QueryCursor(cur)
+#    wait_major_timeout = 600
+#    upgrade_health_checker.check_major_merge(query_cur, wait_major_timeout)
+#    actions.do_suspend_merge(cur, timeout)
 #  # When upgrading from a version prior to 4.2 to version 4.2, the bloom_filter should be disabled.
 #  # The param _bloom_filter_enabled is no longer in use as of version 4.2, there is no need to enable it again.
 #  if actions.get_version(current_version) < actions.get_version('4.2.0.0')\
@@ -2063,6 +2071,9 @@
 #  (desc, results) = query_cur.exec_query("""select count(1) from CDB_OB_MAJOR_COMPACTION where (GLOBAL_BROADCAST_SCN > LAST_SCN or STATUS != 'IDLE')""")
 #  if results[0][0] > 0 :
 #    fail_list.append('{0} tenant is merging, please check'.format(results[0][0]))
+#  (desc, results) = query_cur.exec_query("""select /*+ query_timeout(1000000000) */ count(1) from __all_virtual_tablet_compaction_info where max_received_scn > finished_scn and max_received_scn > 0""")
+#  if results[0][0] > 0 :
+#    fail_list.append('{0} tablet is merging, please check'.format(results[0][0]))
 #  logging.info('check cluster status success')
 #
 ## 5. 检查是否有异常租户(creating，延迟删除，恢复中)
@@ -2858,7 +2869,7 @@
 #    time.sleep(10)
 #
 ## 开始健康检查
-#def do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, zone = ''):
+#def do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, need_check_major_status, zone = ''):
 #  try:
 #    conn = mysql.connector.connect(user = my_user,
 #                                   password = my_passwd,
@@ -2875,6 +2886,8 @@
 #      check_paxos_replica(query_cur, timeout)
 #      check_schema_status(query_cur, timeout)
 #      check_server_version_by_zone(query_cur, zone)
+#      if True == need_check_major_status:
+#        check_major_merge(query_cur, timeout)
 #    except Exception, e:
 #      logging.exception('run error')
 #      raise e
@@ -2909,7 +2922,7 @@
 #      zone = get_opt_zone()
 #      logging.info('parameters from cmd: host=\"%s\", port=%s, user=\"%s\", password=\"%s\", log-file=\"%s\", timeout=%s, zone=\"%s\"', \
 #          host, port, user, password.replace('"', '\\"'), log_filename, timeout, zone)
-#      do_check(host, port, user, password, upgrade_params, timeout, zone)
+#      do_check(host, port, user, password, upgrade_params, timeout, False, zone) # need_check_major_status = False
 #    except mysql.connector.Error, e:
 #      logging.exception('mysql connctor error')
 #      raise e
@@ -3051,6 +3064,7 @@
 #    enable_ddl(cur, timeout)
 #    enable_rebalance(cur, timeout)
 #    enable_rereplication(cur, timeout)
+#    enable_major_freeze(cur, timeout)
 #  except Exception, e:
 #    logging.exception('run error')
 #    raise e
diff --git a/tools/upgrade/upgrade_post_checker.py b/tools/upgrade/upgrade_post_checker.py
index 77e18b1d36..21175cb60d 100755
--- a/tools/upgrade/upgrade_post_checker.py
+++ b/tools/upgrade/upgrade_post_checker.py
@@ -130,6 +130,7 @@ def do_check(conn, cur, query_cur, timeout):
     enable_ddl(cur, timeout)
     enable_rebalance(cur, timeout)
     enable_rereplication(cur, timeout)
+    enable_major_freeze(cur, timeout)
   except Exception, e:
     logging.exception('run error')
     raise e
diff --git a/tools/upgrade/upgrade_pre.py b/tools/upgrade/upgrade_pre.py
index b781585fc8..5786d475c4 100755
--- a/tools/upgrade/upgrade_pre.py
+++ b/tools/upgrade/upgrade_pre.py
@@ -674,7 +674,7 @@
 #
 #      if run_modules.MODULE_HEALTH_CHECK in my_module_set:
 #        logging.info('================begin to run health check action ===============')
-#        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout)
+#        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, False)  # need_check_major_status = False
 #        logging.info('================succeed to run health check action ===============')
 #
 #      if run_modules.MODULE_END_ROLLING_UPGRADE in my_module_set:
@@ -869,7 +869,7 @@
 #
 #      if run_modules.MODULE_HEALTH_CHECK in my_module_set:
 #        logging.info('================begin to run health check action ===============')
-#        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout)
+#        upgrade_health_checker.do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, True) # need_check_major_status = True
 #        logging.info('================succeed to run health check action ===============')
 #
 #    except Exception, e:
@@ -1355,6 +1355,14 @@
 #  # when upgrade across version, disable enable_ddl/major_freeze
 #  if current_version != target_version:
 #    actions.set_parameter(cur, 'enable_ddl', 'False', timeout)
+#    actions.set_parameter(cur, 'enable_major_freeze', 'False', timeout)
+#    actions.set_tenant_parameter(cur, '_enable_adaptive_compaction', 'False', timeout)
+#    # wait scheduler in storage to notice adaptive_compaction is switched to false
+#    time.sleep(60 * 2)
+#    query_cur = actions.QueryCursor(cur)
+#    wait_major_timeout = 600
+#    upgrade_health_checker.check_major_merge(query_cur, wait_major_timeout)
+#    actions.do_suspend_merge(cur, timeout)
 #  # When upgrading from a version prior to 4.2 to version 4.2, the bloom_filter should be disabled.
 #  # The param _bloom_filter_enabled is no longer in use as of version 4.2, there is no need to enable it again.
 #  if actions.get_version(current_version) < actions.get_version('4.2.0.0')\
@@ -2063,6 +2071,9 @@
 #  (desc, results) = query_cur.exec_query("""select count(1) from CDB_OB_MAJOR_COMPACTION where (GLOBAL_BROADCAST_SCN > LAST_SCN or STATUS != 'IDLE')""")
 #  if results[0][0] > 0 :
 #    fail_list.append('{0} tenant is merging, please check'.format(results[0][0]))
+#  (desc, results) = query_cur.exec_query("""select /*+ query_timeout(1000000000) */ count(1) from __all_virtual_tablet_compaction_info where max_received_scn > finished_scn and max_received_scn > 0""")
+#  if results[0][0] > 0 :
+#    fail_list.append('{0} tablet is merging, please check'.format(results[0][0]))
 #  logging.info('check cluster status success')
 #
 ## 5. 检查是否有异常租户(creating，延迟删除，恢复中)
@@ -2858,7 +2869,7 @@
 #    time.sleep(10)
 #
 ## 开始健康检查
-#def do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, zone = ''):
+#def do_check(my_host, my_port, my_user, my_passwd, upgrade_params, timeout, need_check_major_status, zone = ''):
 #  try:
 #    conn = mysql.connector.connect(user = my_user,
 #                                   password = my_passwd,
@@ -2875,6 +2886,8 @@
 #      check_paxos_replica(query_cur, timeout)
 #      check_schema_status(query_cur, timeout)
 #      check_server_version_by_zone(query_cur, zone)
+#      if True == need_check_major_status:
+#        check_major_merge(query_cur, timeout)
 #    except Exception, e:
 #      logging.exception('run error')
 #      raise e
@@ -2909,7 +2922,7 @@
 #      zone = get_opt_zone()
 #      logging.info('parameters from cmd: host=\"%s\", port=%s, user=\"%s\", password=\"%s\", log-file=\"%s\", timeout=%s, zone=\"%s\"', \
 #          host, port, user, password.replace('"', '\\"'), log_filename, timeout, zone)
-#      do_check(host, port, user, password, upgrade_params, timeout, zone)
+#      do_check(host, port, user, password, upgrade_params, timeout, False, zone) # need_check_major_status = False
 #    except mysql.connector.Error, e:
 #      logging.exception('mysql connctor error')
 #      raise e
@@ -3051,6 +3064,7 @@
 #    enable_ddl(cur, timeout)
 #    enable_rebalance(cur, timeout)
 #    enable_rereplication(cur, timeout)
+#    enable_major_freeze(cur, timeout)
 #  except Exception, e:
 #    logging.exception('run error')
 #    raise e