重要参数如下: slow_query_log 慢查询开启状态 slow_query_log_file 慢查询日志存放路径 long_query_time 查询超过多少秒才记录 建议配置如下: [mysqld] slow_query_log = ON slow_query_log_file = /home/mysql/mysql/log/slow.log long_query_time = 1 下面为慢查
使用慢查询日志: 比如说需要找出数据库中比如超过3s的慢SQL,你是怎么找的?用下面的方法+ 1.确保慢查询日志开启查看是否开启: show variables like ‘%slow_query_log%’; 会查出日志的位置和是否开启开启慢查询日志:set global slow_query_log=1; (重启会...
1、常规查询日志(General Query Log): 默认情况下,此日志记录了数据库中的所有客户端连接和查询。 日志格式可以配置为详细、常规或简洁模式。 2、慢查询日志(Slow Query Log): 记录执行时间超过指定阈值的查询。 日志格式可以自定义,但通常包括查询语句、执行时间、客户端地址等信息。 3、错误日志(Error Log): 记...
Satellite 6: How to enable postgres query logging to detect slow running queries Solution Verified- UpdatedJune 14 2024 at 7:35 PM- English Issue If postgres is consuming large amounts of CPU on your Satellite 6 server it may be due to specific queries running longer than expected. ...
Extremely slow PostgreSQL query with ORDER and LIMIT clauses 优化办法: 改为子查询: select * from (select * from work_log_19 where log_date=20180930 and work_process=458 and uid='9999999' order by log_time ) as a order by log_time limit 1编辑...
Understand which tenants in your system are producing slow queries. Extract specific query samples from your log files and see them associated in one place together with your query statistics. This provides you with the insights you need to improve PostgreSQL query performance. Start a conversation ...
Find root causes of slow queries Understand why a query is slow and get tuning recommendations on how to make the query faster. Resolve database slowdowns Identify slowdowns for specific queries over time, I/O vs CPU time spent, and buffer cache hit ratio for each query. ...
1、查看mysql的慢查询日志是否开启 show variables like ‘%query%’; 可以看到slow_query_log的值是OFF,也就是mysql默认是不启用慢查询日志的。...这里还有个long_query_time,默认是10秒,也就是超过了10秒即为慢查询。...log_queries_not_using_indexes,如果设置为ON,则会将所有没有使用索引的查询都记录为...
The slow Postgres query is gone. The 0.1% unlucky few who would have been affected by the issue are happy too. Seeing the impact of the change using Datadog allowed us to instantly validate that altering that part of the query was the right thing to do. ...
statements that are logged. If you set log_min_duration_statement to 900ms, for example, it will only log the queries that exceed this time. Of course, this is only useful as a volume control if the value you pick is a reasonable threshold for what a ‘slow’ query is ...