Too many open files 问题

一般是代码有Bug导致链接泄露，比如：流用完没有释放。如果不够用可以改系统配置。
1) What is ulimit in Linux? The ulimit command allows you to control the user resource limits in the system such as process data size, process virtual memory, and process file size, number of process etc.
2) What happens when the settings in this command are not set up properly? Various issues happen like native OutOfMemory, Too Many Open files error, dump files are not being generated completely etc.
3) How can you check current ulimit settings? There are various ways to check the current settings: a) From the command prompt, issue $ ulimit -a
来源：云原生后端社区