Golang服务器超时

Question

I have a very simple go server:

package main

import(
  "net/http"
  "fmt"
  "log"
)

func test(w http.ResponseWriter, r *http.Request){
  fmt.Println("No bid")
  http.Error(w, "NoBid", 204)
}

func main() {
  http.HandleFunc("/test/bid", test)
  http.ListenAndServe(":8080", nil)
  log.Println("Done serving")
}

I then run the apache benchmark tool:

ab -c 50 -n 50000 -p post.txt http://127.0.0.1:8080/test/bid

The Server runs and responds to about 15000 requests and then times out. I was wondering why this happens and if there is something I can do about this.

Answer 1

If you running in Linux, Maybe too many open files, so it can't create connection, You need change system config to support more connections.

For example,

edit /etc/security/limits.conf add

*    soft    nofile 100000
*    soft    nofile 100000

To open more file.

edit /etc/sysctl.conf

# use more port
net.ipv4.ip_local_port_range = 1024 65000
# keep alive timeout
net.ipv4.tcp_keepalive_time = 300
# allow reuse
net.ipv4.tcp_tw_reuse = 1
# quick recovery
net.ipv4.tcp_tw_recycle = 1