压测限制出现 too many open files 错误

Question

在用 K6 本机压测的时候会遇到下面的错误：

on-manager/user/state\": dial tcp 10.132.129.xx:443: socket: too many open files"
WARN[0003] Request Failed                                error="Post \"http://example.com/user/state\": dial tcp 10.132.129.62:443: socket: too many open files"
WARN[0003] Request Failed                                error="Post \"http://example.com/user/state\": dial tcp 10.132.129.62:443: socket: too many open files"
WARN[0003] Request Failed                                error="Post \"http://example.com/user/state\": dial tcp 10.132.129.62:443: socket: too many open files"
WARN[0003] Request Failed

这个是本地机器的限制，可以使用命令查看当前配置：

> ulimit -n
> 256

就是说当前系统的每一个进程只能最多打开 256 个文件，若是临时修改，执行下面命令即可，比较快速：

ulimit -n 512

之后可再次执行压测。