show profiles 详解

By admin

- One minute read - 74 words

https://dev.mysql.com/doc/refman/5.7/en/show-profile.html

此功能将在新版本中被移除，性能分析使用新方法来代替。(官方提供了此命令的使用方法, 对于 show profile for query ID / show profile  CPU for query ID 结果中每项的说明信息请参考： https://www.cnblogs.com/itcomputer/articles/5056127.html）

Note

These statements are deprecated and will be removed in a future MySQL release. Use the Performance Schema instead; see Chapter 25, MySQL Performance Schema.

对于新版本我们也可以直接查询  INFORMATION_SCHEMA PROFILING . See Section 25.20, “The INFORMATION_SCHEMA PROFILING Table”.

例如：

SHOW PROFILE FOR QUERY 2;
SELECT STATE, FORMAT(DURATION, 6) AS DURATION FROM INFORMATION_SCHEMA.PROFILING WHERE QUERY_ID = 2 ORDER BY SEQ;