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mysql配置文档
max-connections=10000
代码
orm
-c: 并发量100
-n: 总请求量300
➜ ~ ab -c 100 -n 300 "http://localhost:8080/pool" This is ApacheBench, Version 2.3 <$Revision: 1826891 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking localhost (be patient) Completed 100 requests Completed 200 requests Completed 300 requests Finished 300 requests Server Software: Server Hostname: localhost Server Port: 8080 Document Path: /pool Document Length: 304 bytes Concurrency Level: 100 Time taken for tests: 4.073 seconds Complete requests: 300 Failed requests: 0 Total transferred: 128400 bytes HTML transferred: 91200 bytes Requests per second: 73.66 [#/sec] (mean) Time per request: 1357.601 [ms] (mean) Time per request: 13.576 [ms] (mean, across all concurrent requests) Transfer rate: 30.79 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 2 2.2 1 8 Processing: 1001 1012 8.2 1010 1036 Waiting: 1001 1012 8.1 1010 1036 Total: 1002 1014 9.5 1012 1043 Percentage of the requests served within a certain time (ms) 50% 1012 66% 1016 75% 1019 80% 1021 90% 1031 95% 1035 98% 1039 99% 1040 100% 1043 (longest request) ➜ ~
设置空闲连接为10个
最大可以打开的连接为10个 mysql.conf中可以修改最大连接数.
db/db.go
sqlDB.SetMaxIdleConns(10) // SetMaxOpenConns 设置打开数据库连接的最大数量。 sqlDB.SetMaxOpenConns(10) // SetConnMaxLifetime 设置了连接可复用的最大时间。 sqlDB.SetConnMaxLifetime(time.Hour)
controller/pool.go
func PoolHandler(c *gin.Context) { time.Sleep(time.Second) var user model.User tx := db.DB.Raw("SELECT id, name, age FROM users WHERE name = ? limit 1", "D42").Scan(&user) if tx.Error != nil { panic(tx.Error) } logger.Debugf("raw sql id:%v name:%v age:%v", user.ID, user.Name, user.Age) c.JSON(200, user) }
SHOW PROCESSLIST;
Id User Host db Command Time State Info 8 root localhost:51148 demo_go Query 0 starting SHOW PROCESSLIST 900 root localhost:64598 demo_go Sleep 0 901 root localhost:64754 demo_go Sleep 0 902 root localhost:64755 demo_go Sleep 0 903 root localhost:64756 demo_go Sleep 0 904 root localhost:64757 demo_go Sleep 0 905 root localhost:64758 demo_go Sleep 0 906 root localhost:64759 demo_go Sleep 0 907 root localhost:64760 demo_go Sleep 0 908 root localhost:64761 demo_go Sleep 0 909 root localhost:64762 demo_go Sleep 0
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