duanqiao1961 2017-02-09 02:55
浏览 257

mysql连接超时的最佳解决方案是什么?

I am writing a small web app in Go, which uses mysql to store data.

I got intermittent mysql error if the web sever didn't get any request after some amount of time(> 8 hours):

[mysql] 2017/02/08 16:31:56 packets.go:33: unexpected EOF
[mysql] 2017/02/08 16:31:56 packets.go:130: write tcp 127.0.0.1:49188->127.0.0.1:3306: write: broken pipe

I found some related discussion on github(issue 529, issue 257 and issue 446). From what I understand, mysql db would close the connection if timeout is reached.

I tried to set SetMaxOpenConns to 9 and SetMaxIdleConns to 0 as some people recommended. However, this threw exception immediately. (But if I set SetMaxIdleConns larger than 0, there was no immediate exception thrown)

I also tried to set SetConnMaxLifetime to 5 mins. This threw exception too after 5 mins.

Now I am trying the code below:

db.SetConnMaxLifetime(0)
db.SetMaxOpenConns(10)
db.SetMaxIdleConns(5)

It has been running for 20 mins. It's still too early to tell. (UPDATE: this doesn't work either)

Here is configuration:

  • driver: go-sql-driver V1.3.
  • go version: go1.7.1 darwin/amd64
  • mysql: latest from docker hub
  • rkt version: 1.18
  • CoreOS: 1284.0.0
  • 写回答

2条回答 默认 最新

  • dqpdb82600 2017-02-09 04:36
    关注

    Perhaps you can start a heartbeat Goroutine to avoid timeout.

    评论

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