我有一個交通繁忙的服務器(超過800K qps)與go1.7。Goroutine長時間處於IO等待狀態
從http://urltoserver:debugport/debug/pprof/goroutine?debug=2我看到8K goroutines,其中近1800年在IO等待幾分鐘。其中一個這樣的goroutine堆棧如下。
goroutine 128328653 [IO wait, 54 minutes]:
net.runtime_pollWait(0x7f0fcc60c378, 0x72, 0x7cb)
/usr/local/go/src/runtime/netpoll.go:160 +0x59
net.(*pollDesc).wait(0xc4231d0a00, 0x72, 0xc42479fa20, 0xc42000c048)
/usr/local/go/src/net/fd_poll_runtime.go:73 +0x38
net.(*pollDesc).waitRead(0xc4231d0a00, 0x92f200, 0xc42000c048)
/usr/local/go/src/net/fd_poll_runtime.go:78 +0x34
net.(*netFD).Read(0xc4231d09a0, 0xc423109000, 0x1000, 0x1000, 0x0, 0x92f200, 0xc42000c048)
/usr/local/go/src/net/fd_unix.go:243 +0x1a1
net.(*conn).Read(0xc4234282b8, 0xc423109000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
/usr/local/go/src/net/net.go:173 +0x70
net/http.(*connReader).Read(0xc420449840, 0xc423109000, 0x1000, 0x1000, 0xc422b38b68, 0x100000000, 0xc421810601)
/usr/local/go/src/net/http/server.go:586 +0x144
bufio.(*Reader).fill(0xc422e22360)
/usr/local/go/src/bufio/bufio.go:97 +0x10c
bufio.(*Reader).Peek(0xc422e22360, 0x4, 0x7a066c, 0x4, 0x1, 0x0, 0x0)
/usr/local/go/src/bufio/bufio.go:129 +0x62
net/http.(*conn).readRequest(0xc422b38b00, 0x931fc0, 0xc424d19440, 0x0, 0x0, 0x0)
/usr/local/go/src/net/http/server.go:762 +0xdff
net/http.(*conn).serve(0xc422b38b00, 0x931fc0, 0xc424d19440)
/usr/local/go/src/net/http/server.go:1532 +0x3d3
created by net/http.(*Server).Serve
/usr/local/go/src/net/http/server.go:2293 +0x44d
任何人都遇到過這個問題? 任何指針讚賞。
究竟是什麼問題?你想關閉活動連接嗎?你有沒有超時設置,如此反應遲鈍的客戶端不會連接連接? – JimB
@JimB如何在golang中設置服務器端的連接超時。我知道客戶端。我用http.ListenAndServe啓動我的服務器 –
@VishalKumar複製[ListenAndServe代碼](https://golang.org/src/net/http/server.go#L2349)。修改爲[ReadTimeout](https://godoc.org/net/http#Server.ReadTimeout),WriteTimeout,...設置值。 –