mysql如何查看缓冲池命中率
发布时间:2022-01-12 10:52:43 所属栏目:MySql教程 来源:互联网
导读:这篇文章给大家分享的是有关mysql如何查看缓冲池命中率的内容。小编觉得挺实用的,因此分享给大家做个参考,一起跟随小编过来看看吧。 方法一: mysql show engine innodb statusG; *************************** 1. row *************************** Type:
这篇文章给大家分享的是有关mysql如何查看缓冲池命中率的内容。小编觉得挺实用的,因此分享给大家做个参考,一起跟随小编过来看看吧。 方法一: mysql> show engine innodb statusG; *************************** 1. row *************************** Type: InnoDB Name: Status: ===================================== 2016-06-07 09:40:38 7f593136f700 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 6 seconds #以下信息是最近6秒的平均值 ............................................. ............................................. Buffer pool size 393208 Buffer pool size, bytes 6442319872 Free buffers 8807 Database pages 373575 Old database pages 137869 Modified db pages 43 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 1132357, not young 92318292 2.33 youngs/s, 2496.75 non-youngs/s Pages read 2127203, created 1317816, written 1762250 18.00 reads/s, 3.83 creates/s, 14.33 writes/s Buffer pool hit rate 998 / 1000, young-making rate 0 / 1000 not 314 / 1000 #缓冲池命中率 结果:最近6秒缓冲池命中率是99.8% 方法二: mysql> show global status like 'innodb%read%'; +---------------------------------------+-------------+ | Variable_name | Value | +---------------------------------------+-------------+ | Innodb_buffer_pool_read_ahead_rnd | 0 | | Innodb_buffer_pool_read_ahead | 839015 | #预读次数 | Innodb_buffer_pool_read_ahead_evicted | 0 | | Innodb_buffer_pool_read_requests | 1497697965 | #从缓冲池中读取页的次数 | Innodb_buffer_pool_reads | 1227641 | #从物理磁盘读取页的次数 | Innodb_data_pending_reads | 0 | | Innodb_data_read | 34861846528 | #总共读入的字节数 | Innodb_data_reads | 2128711 | #总共读取的次数 | Innodb_master_thread_active_loops | 63667 | | Innodb_master_thread_idle_loops | 24896 | | Innodb_pages_read | 2127692 | | Innodb_rows_read | 803908452 | | Innodb_read_views_memory | 2176 | +---------------------------------------+-------------+ 13 rows in set (0.00 sec) 缓冲池命中率= Innodb_buffer_pool_read_requests/(Innodb_buffer_pool_read_requests+Innodb_buffer_pool_reads+Innodb_buffer_pool_read_ahead)=1497697965/(1497697965+1227641+839015)=99.85% 平均读取的字节数=Innodb_data_read/ Innodb_data_reads=16376 可以看出系统的内存使用效率还是很高的 感谢各位的阅读!关于“mysql如何查看缓冲池命中率”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,让大家可以学到更多知识,如果觉得文章不错,可以把它分享出去让更多的人看到吧! (编辑: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! |
站长推荐
热点阅读