golang-too_many_open_files-Workaround

This is a creation in Article, where the information may have evolved or changed.

This is the system resource limit, usually single process can not exceed 1024, I use CGO to set, the code is as follows:

package main/*#include <stdio.h>#include <sys/time.h>#include <sys/resource.h>int rlimit_init() {    printf("setting rlimit\n");    struct rlimit limit;    if (getrlimit(RLIMIT_NOFILE, &limit) == -1) {    printf("getrlimit error\n");    return 1;    }    limit.rlim_cur = limit.rlim_max = 50000;    if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {    printf("setrlimit error\n");    return 1;    }    printf("set limit ok\n");    return 0;}*/import "C"func main() {    C.rlimit_init()}

Or use the Syscall package

var rlim syscall.Rlimiterr := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rlim)if err != nil {    fmt.Println("get rlimit error: " + err.Error())    os.Exit(1)}rlim.Cur = 50000rlim.Max = 50000err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rlim)if err != nil {    fmt.Println("set rlimit error: " + err.Error())    os.Exit(1)}

After compiling with go build, you need to run with the root permission.