检查mysql数据库的加载

Question

什么是监控mysql性能和加载,每秒查询,一小时总查询等的最佳方法？

Answer 1

您可以使用mysqlslap5.1版之后由MySQL提供的实用程序.

在Windows命令提示符下触发查询以获取csv格式或文本格式的报告.

mysqlslap.exe --user=root -p --auto-generate-sql --concurrency=40 --number-of-queries=10000 --number-char-cols=4 --number-int-cols=7 >> /Desktop/output.log -vv

mysqlslap.exe --csv=/Desktop/output.csv --user=root -p --auto-generate-sql --concurrency=50 --number-of-queries=500 --number-char-cols=4 --number-int-cols=7 -vv

此命令也在Unix服务器上运行.

此命令的输出将如下所示.

Building Create Statements for Auto
Building Query Statements for Auto
Parsing engines to use.
Starting Concurrency Test
Loading Pre-data
Generating primary key list
Generating stats
Benchmark

Average number of seconds to run all queries: 124.478 seconds 

Minimum number of seconds to run all queries: 124.478 seconds

Maximum number of seconds to run all queries: 124.478 seconds

Number of clients running queries: 40

Average number of queries per client: 250

Answer 2

首先，一定要注意慢速查询：http://dev.mysql.com/doc/refman/5.0/en/slow-query-log.html

mysqladmin extended非常有用。请参阅http://www.mysql.com/news-and-events/newsletter/2004-01/a0000000301.html了解一些提示。