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MySQL 单查询性能比较的真相

WBOY
WBOYOriginal
2016-06-07 17:34:04985browse

根据morgo的建议suggested by morgo我对 Impact of column types on MySQL JOIN performance一文中提到的查询及数据集做了一些小

根据morgo的建议我对 Impact of column types on MySQL JOIN performance一文中提到的查询及数据集做了一些小测试,,但是却发现另一个层面的问题:响应时间 (aka MySQL versions).

The answer

简单的说。作为名优秀的咨询师,这些结论都是有前提的 :-)

The test

查询语句如下:

SELECT *
  FROM a
  JOIN b ON b.a_id = a.id
 WHERE a.id BETWEEN 10000 AND 15000
;

以下所有测试都基于相同的查询语句

MySQL相关的参数设置如下。我还需要考虑 join buffer或是其他的单会话的buffers (read_buffer_size,read_rnd_buffer_size,join_buffer_size)么?

innodb_buffer_pool_size        = 768M
innodb_buffer_pool_instances  = 1
innodb_file_per_table          = 1

The results

The Graph

the_truth.png

linux

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