MySQL 的 read_buffer_size 参数是如何影响写缓冲和写性能的？

来自国外博客的一篇文章介绍了MySQL 的 read_buffer_size 参数是如何影响写缓冲和写性能。

据说 read_buffer_size 参数只影响以下两种情况的写数据的性能：

• SELECT INTO … OUTFILE ‘fileName‘
  • When writing to the OUTFILE, the writes are buffered before writing to OUTFILE
• When filesort is used, during merge buffers and when merged results are written to a temporary file, then writes are buffered

下表是该文章测试的一些数据：

详细内容请看原文：

http://venublog.com/2010/06/23/how-read_buffer_size-impacts-write-buffering-and-write-performance/