mysql> set global slow_query_log=1; 6. 执行 SQL 进行验证 mysql> select sleep(5); +---+ | sleep(5) | +---+ | 0 | +---+ 7. 验证新生成文件记录成功 cat /opt/mysql/data/3306/mysql-slow.log [root@DMP1 3306]# cat mysql-slow.log /opt/mysql/base/5.7.31/bin/mysqld, Version...
# Time:16032811:31:47# User@Host: root[root] @ localhost [] Id:4# Query_time:3.000955Lock_time:0.000000Rows_sent:1Rows_examined:0use king; SET timestamp=1459135907;selectsleep(3); # Time:16032811:31:57# User@Host: root[root] @ localhost [] Id:4# Query_time:4.001169Lock_time:0.0000...
--为便于演示,我们将全局和session级别long_query_time设置为1 root@localhost[tempdb]> set global long_query_time=1; Query OK, 0 rows affected (0.00 sec) root@localhost[tempdb]> set session long_query_time=1; Query OK, 0 rows affected (0.00 sec) --Author : Leshami --Blog : http://blo...
slow_query_log=1 启动慢查询日志 long_query_time=3 当SQL语句执行时间超过3s时,就会被记录到日志中 systemctl restart mysqld 重启数据库 ll /var/lib/mysql/*slow* 查看日志文件是否生成 localhost-slow.log 1. 2. 3. 4. 5. 6. 7.
[SQL]SET slow_query_log=1 [Err] 1229 - Variable 'slow_query_log' is a GLOBAL variable and should be set with SET GLOBAL 1. 2. 3. SHOW VARIABLES LIKE '%slow%' SET GLOBAL slow_query_log=1 SHOW VARIABLES LIKE '%slow%' 1.
slow_query_log=1 slow_query_log_file=/opt/bitnami/mysql/logs/mysqld.log long_query_time=10.0 [client] port=3306 socket=/opt/bitnami/mysql/tmp/mysql.sock default-character-set=UTF8 plugin_dir=/opt/bitnami/mysql/lib/plugin [manager] port=3306 socket=/opt/bitnami/mysql/tmp/mysql.sock pid...
1、my.cnf配置文件慢慢日志文件路径相关配置: slow_query_log_file = /data/GreatSQL/logs/slow.log 2、但是在内存中查询到到slow_query_log_file变量却与配置不一致 mysqladmin var |grep slow_query_log_file | slow_query_log_file | /data/GreatSQL/logs/bclinux01.log.000001 ...
是在文件夹中一个日志文件，其中记录了错误日志信息
2019-12-03 14:37 −优化sql语句步骤: 1.发现问题 2.分析执行计划 3.优化索引 4.改写sql (再达不到优化效果的话 进行数据库分库分表) 1.发现问题途径 1.用户上报性能问题 2.慢查询日志发现问题SQL 3.数据库实时监控长时间运行的SQL 2.设置MYSQL set global slow... ...
--slow_query_logenables the log. With an argument of 0, this option disables the log. To specify a log file name, use--slow_query_log_file=file_name. To specify the log destination, use thelog_outputsystem variable (as described inSection 7.4.1, “Selecting General Query Log and Slow...