Home Database Mysql Tutorial MySQL insert性能优化笔记

MySQL insert性能优化笔记

Jun 07, 2016 pm 05:21 PM

对于一些数据量较大的系统,面临的问题除了是查询效率低下,还有一个很重要的问题就是插入时间长。我们就有一个业务系统,每天的

对于一些数据量较大的系统,面临的问题除了是查询效率低下,还有一个很重要的问题就是插入时间长。我们就有一个业务系统,每天的数据导入需要4-5个钟。这种费时的操作其实是很有风险的,假设程序出了问题,想重跑操作那是一件痛苦的事情。因此,提高大数据量系统的MySQL insert效率是很有必要的。

经过对MySQL的测试,发现一些可以提高insert效率的方法,供大家参考参考。

1. 一条SQL语句插入多条数据。

常用的插入语句如:

  • , 0); 
  • , 1); 
  • 修改成:

    修改后的插入操作能够提高程序的插入效率。这里第二种SQL执行效率高的主要原因有两个,一是减少SQL语句解析的操作, 只需要解析一次就能进行数据的插入操作,二是SQL语句较短,可以减少网络传输的IO。

    这里提供一些测试对比数据,分别是进行单条数据的导入与转化成一条SQL语句进行导入,,分别测试1百、1千、1万条数据记录。

    记录数 单条数据插入 多条数据插入

    1百 0.149s 0.011s

    1千 1.231s 0.047s

    1万 11.678s 0.218s

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