diff --git a/cachecloud-open-web/src/main/resources/mapper/AppClientCostTimeTotalStatDao.xml b/cachecloud-open-web/src/main/resources/mapper/AppClientCostTimeTotalStatDao.xml
index a802f141..8c8fc75c 100644
--- a/cachecloud-open-web/src/main/resources/mapper/AppClientCostTimeTotalStatDao.xml
+++ b/cachecloud-open-web/src/main/resources/mapper/AppClientCostTimeTotalStatDao.xml
@@ -24,7 +24,7 @@
           max_instance_port = if(hundred_max>#{hundredMax},max_instance_port,#{maxInstancePort}),
           max_instance_id =   if(hundred_max>#{hundredMax},max_instance_id,#{maxInstanceId}),
           max_client_ip =     if(hundred_max>#{hundredMax},max_client_ip,#{maxClientIp}),
-          mean = format(total_cost/total_count,2),
+          mean = CONVERT(total_cost/total_count,DECIMAL(12,2)),
           create_time = now(),
           accumulation = accumulation + 1;
 	</insert>
@@ -47,7 +47,7 @@
           max_instance_port = if(hundred_max>#{clientCostTime.hundredMax},max_instance_port,#{clientCostTime.maxInstancePort}),
           max_instance_id =   if(hundred_max>#{clientCostTime.hundredMax},max_instance_id,#{clientCostTime.maxInstanceId}),
           max_client_ip =     if(hundred_max>#{clientCostTime.hundredMax},max_client_ip,#{clientCostTime.maxClientIp}),
-          mean = format(total_cost/total_count,2),
+          mean = CONVERT(total_cost/total_count,DECIMAL(12,2)),
           create_time = now(),
           accumulation = accumulation + 1;
 	</insert>
@@ -61,4 +61,4 @@
     	where app_id=#{appId} and collect_time between #{startTime} and #{endTime} and command=#{command}
     </select>
 
-</mapper>
\ No newline at end of file
+</mapper>