qps统计方法小结

来源：朝湓教育网

这次给大家带来qps统计方法小结，qps统计方法的注意事项有哪些，下面就是实战案例，一起来看一下。

统计最近N秒内的QPS值(包括每秒select，insert等值)

mysql> select variable_name,sum(per_sec) as qps from (select 
straight_join lower(gs0.variable_name) as variable_name, 
 (gs1.variable_value - gs0.variable_value)/5 as per_sec from ( 
select variable_name ,variable_value from 
information_schema.global_status where variable_name in 
('com_select','com_update','com_insert','com_replace','com_delete') 
union all select '',sleep(5) from dual ) as gs0 join 
information_schema.global_status gs1 using (variable_name)) t group by 
variable_name with rollup;
+---------------+---------+| variable_name | qps |+---------------+---------+| com_delete | 0 || com_insert | 2.2 || com_replace | 0 || com_select | 11524.8 || com_update | 3 || NULL | 11530 |+---------------+---------+6 rows in set (5.00 sec)

统计db启动以来的qps值，慢查询数量等信息

mysql> s
--------------
mysql Ver 14.14 Distrib 5.5.35, for Linux (x86_) using 
readline
 5.1
Connection id:98313987
Current
 database:udb
Current user:ucloud@172.23.0.48
SSL:Not in use
Current pager:stdout
Using outfile:''
Using delimiter:;
Server version:5.5.35-log MySQL Community Server (GPL) by Remi
Protocol version:10
Connection:172.23.9.201 via 
TCP/IP
Server characterset:utf8
Db characterset:utf8
Client characterset:utf8
Conn. characterset:utf8
TCP port:3206
Uptime:274 days 1 hour 22 min 29 sec
Threads: 172 Questions: 75590986 Slow queries: 150149138 Opens: 
7799 Flush tables: 15 Open tables: 973 Queries per second avg: 
319.261

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