[乐意黎]MySQL日志 [Note] InnoDB: page_cleaner: 1000ms intended loop took 5595ms.

如下所示， MySQL日志中有如下记录:

2018-07-03T01:14:23.720861Z 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 8372ms. The settings might not be optimal. (flushed=4 and evicted=0, during the time.)
2018-07-03T01:18:18.220232Z 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 13804ms. The settings might not be optimal. (flushed=8 and evicted=0, during the time.)
2018-07-03T01:20:05.130688Z 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 12417ms. The settings might not be optimal. (flushed=0 and evicted=0, during the time.)
2018-07-03T01:20:56.718211Z 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 5595ms. The settings might not be optimal. (flushed=0 and evicted=0, during the time.)

2018-07-03T01:23:15.650508Z 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 5595ms. The settings might not be optimal. (flushed=2 and evicted=0, during the time.)

 

解决方法: 

修改 my.cnf 文件

增加:

 

innodb_buffer_pool_size=125G

innodb_buffer_pool_instances=2

innodb_log_file_size=512M

innodb_log_files_in_group=2

innodb_page_cleaners=2