https://learn.microsoft.com/en-us/troubleshoot/sql/database-engine/performance/troubleshoot-slow-running-queries https://erikdarling.com/monitoring-sql-server-for-query-timeouts-with-extended-events/ https://sqlmaestros.com/free-sql-video-troubleshoot-slow-running-query-sql-server-extended-events-wa...
SQL Server查找哪些执行慢的语句 1、根据 https://learn.microsoft.com/zh-cn/troubleshoot/sql/database-engine/performance/troubleshoot-slow-running-queries网址提供的脚本。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SELECT req.session_id , req.total_elapsed_timeASduration_ms , req.cpu_time...
Waiting: why are queries slow? If you find queries that exceed your predefined threshold, examine why they could be slow. The cause of performance problems can be grouped into two categories, running or waiting: WAITING: Queries can be slow because they're waiting on a bottleneck for a long...
Running vs. Waiting: why are queries slow? Diagnose and resolve waiting queries Show 2 more Original product version:SQL Server Original KB number:243589 Introduction This article describes how to handle a performance issue that database applications may experience when using SQL Server: slow performa...
slow_query_log=1## 文件位置及名字 slow_query_log_file=/data/mysql/slow.log ## 设定慢查询时间 long_query_time=0.4## 没走索引的语句也记录 log_queries_not_using_indexes vim/etc/my.cnf slow_query_log=1slow_query_log_file=/data/mysql/slow.log ...
Slow SQL queries in ApsaraDB for ClickHouse,ApsaraDB for ClickHouse:If your ApsaraDB for ClickHouse cluster encounters performance issues or when you perform periodic maintenance, you can view slow SQL queries to troubleshoot the issues. This topic descr
size() + " queries running."); } } 即当sql的执行时间大于 alertRunningSec,kylin将其定性为 slow query sql,alertRunningSec的获取如下: public BadQueryDetector() { super("BadQueryDetector"); this.setDaemon(true); this.kylinConfig = KylinConfig.getInstanceFromEnv(); this.detectionInterval = ...
slow_query_log=1 ## 文件位置及名字 slow_query_log_file=/data/mysql/slow.log ## 设定慢查询时间 long_query_time=0.4 ## 没走索引的语句也记录 log_queries_not_using_indexes vim /etc/my.cnf slow_query_log=1 slow_query_log_file=/data/mysql/slow.log ...
slow_query_log=1 slow_query_log_file=/data/mysql/slow.log long_query_time=0.1 log_queries_not_using_indexes mysql> select @@long_query_time; # 默认十秒才记录慢日志 mysql> show variables like 'slow_query_log%'; mysql> show variables like 'long%'; mysql> show variables like '%using_...
-- Find top 10 longest running queriesSELECTTOP10*FROMsys.dm_pdw_exec_requestsORDERBYtotal_elapsed_timeDESC; 若要更好地针对慢速查询,请在运行脚本时使用以下提示: 按任一排序submit_time DESC或total_elapsed_time DESC具有结果集顶部存在的运行时间最长的查询。