mysql中如何正确安全清空在线慢查询日志slow log
发布时间：2021-12-26 11:45:07 所属栏目：MySql教程 来源：互联网
导读：这篇文章将为大家详细讲解有关mysql中如何正确安全清空在线慢查询日志slow log，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。 1, see the slow log status; mysql show variables like %slow%; +---------------------
|
这篇文章将为大家详细讲解有关mysql中如何正确安全清空在线慢查询日志slow log，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。 1, see the slow log status; mysql> show variables like '%slow%'; +---------------------+------------------------------------------+ | Variable_name | Value | +---------------------+------------------------------------------+ | log_slow_queries | ON | | slow_launch_time | 2 | | slow_query_log | ON | | slow_query_log_file | /mysqllog/slow_log/slow_queries_3306.log | +---------------------+------------------------------------------+ 4 rows in set (0.00 sec) 2, stop the slow log server. mysql> set global slow_query_log=0; Query OK, 0 rows affected (0.27 sec) mysql> show variables like '%slow%'; +---------------------+------------------------------------------+ | Variable_name | Value | +---------------------+------------------------------------------+ | log_slow_queries | OFF | | slow_launch_time | 2 | | slow_query_log | OFF | | slow_query_log_file | /mysqllog/slow_log/slow_queries_3306.log | +---------------------+------------------------------------------+ 4 rows in set (0.00 sec) mysql> mysql> show variables like '%slow%'; -- check slow log status +---------------------+------------------------------------------+ | Variable_name | Value | +---------------------+------------------------------------------+ | log_slow_queries | OFF | | slow_launch_time | 2 | | slow_query_log | OFF | | slow_query_log_file | /mysqllog/slow_log/slow_queries_3306.log | +---------------------+------------------------------------------+ 4 rows in set (0.00 sec) 3, reset the new path of slow log mysql> set global slow_query_log_file='/mysqllog/slow_log/slow_queries_3306_new.log'; Query OK, 0 rows affected (0.03 sec) 4, start the slow log server mysql> mysql> mysql> set global slow_query_log=1; Query OK, 0 rows affected (0.01 sec) mysql> show variables like '%slow%'; +---------------------+----------------------------------------------+ | Variable_name | Value | +---------------------+----------------------------------------------+ | log_slow_queries | ON | | slow_launch_time | 2 | | slow_query_log | ON | | slow_query_log_file | /mysqllog/slow_log/slow_queries_3306_new.log | +---------------------+----------------------------------------------+ 4 rows in set (0.00 sec) 5, check the slow sql in the new slow log file. mysql> select sleep(10) as a, 1 as b; +---+---+ | a | b | +---+---+ | 0 | 1 | +---+---+ 1 row in set (10.00 sec) mysql> [mysql@xxx-xxx ~]$ more /mysqllog/slow_log/slow_queries_3306_new.log ...... Time Id Command Argument # Time: 140213 6:44:24 # User@Host: root[root] @ localhost [] # Query_time: 10.000365 Lock_time: 0.000000 Rows_sent: 1 Rows_examined: 0 SET timestamp=1392273864; select sleep(10) as a, 1 as b; 6, backup the old big slow log file to other directory. mv /mysqllog/slow_log/slow_queries_3306.log /mysqlbackup/slow_log/slow_queries_3306.log.bak.20140213 关于“mysql中如何正确安全清空在线慢查询日志slow log”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。 （编辑：91站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
