记一次使用pt-query-digest工具分析MySQL慢查询日志_attribute pct total min max avg 95% stddev median-优快云博客

最近遇到了MySQL性能问题，使用percona 的 pt-query-digest工具分析性能的瓶颈点。并且pt-query-digest工具要优于MySQL本身自带的mysqldumpslow工具。

查看pt-query-digest工具在ubuntu下的安装流程请看：ubuntu下安装pt-query-digest_一缕阳光a的博客-优快云博客https://blog.youkuaiyun.com/zgaoq/article/details/124710484?spm=1001.2014.3001.5502

先将结果贴上，然后在分析：

[root@xxx log]# pt-query-digest   mysql-slow.log

# 110ms user time, 20ms system time, 37.57M rss, 49.25M vsz
# Current date: Wed May 11 15:49:08 2022
# Hostname: aaaa
# Files: /home/ddd/slow_query/slow3306_small.log
# Overall: 10 total, 7 unique, 0.00 QPS, 0.02x concurrency _______________
# Time range: 2022-04-27T15:39:28 to 2022-04-28T14:55:06
# Attribute          total     min     max     avg     95%  stddev  median
# ============     ======= ======= ======= ======= ======= ======= =======
# Exec time          1648s   500ms    827s    165s    271s    235s     29s
# Lock time            6ms       0     1ms   629us   925us   343us   626us
# Rows sent              1       0       1    0.10       0    0.30       0
# Rows examine      25.35M   1.48k   4.81M   2.53M   4.70M   2.21M   4.70M
# Rows affecte       1.43M       0 488.28k 146.48k 485.50k 222.49k       0
# Bytes sent         4.64G       0   1.08G 475.62M   1.08G 506.28M 106.64M
# Query size           864      13     543   78.55  11