Error: EMFILE: too many open files, watch, unless I use sudo

Question

描述

最近我运行遇到了一个问题。我无法在 element-web 目录中运行 yarn start，我得到这些 errors. Originally I thought it had something to do with element-web itself so I created an issue. Some time after that I tried to run wintersmith preview in bibviz directory and got the same errors. This was weird so I tried to create an Angular project and run ng serve and errors again. I headed to the issue to close it as it wasn't an element-web issue. I found that there was another issue created with the same problem. It had already been closed by turt2live 说 it looks like you've run out of memory on your system。基于此，我尝试在后台关闭大多数程序运行ning，现在所有命令都有效。

我确信 ng serve 过去曾经工作过。

我的 PC 有 16 GB 的 RAM，当我在 7/16 GB 时命令已经失败。运行执行命令时，我看不到任何内存峰值。运行带有 sudo 的命令也完全消除了问题。这对我来说没有任何意义。

研究将我引向 ulimits，但它们似乎没有效果。我也安装了 watchman 没有效果。

谁能告诉我我错过了什么？

提前致谢！

信息

我正在使用 Debian 11 Bullseye。这是一些可能有用的命令的输出。

作为普通用户：

> uname -a
Linux Simon-s-PC 5.8.0-3-amd64 #1 SMP Debian 5.8.14-1 (2020-10-10) x86_64 GNU/Linux
> sudo sysctl fs.inotify.max_user_watches
fs.inotify.max_user_watches = 524288
> ulimit -a
-t: cpu time (seconds)              unlimited
-f: file size (blocks)              unlimited
-d: data seg size (kbytes)          unlimited
-s: stack size (kbytes)             8192
-c: core file size (blocks)         0
-m: resident set size (kbytes)      unlimited
-u: processes                       46482
-n: file descriptors                8192
-l: locked-in-memory size (kbytes)  unlimited
-v: address space (kbytes)          unlimited
-x: file locks                      unlimited
-i: pending signals                 63664
-q: bytes in POSIX msg queues       819200
-e: max nice                        0
-r: max rt priority                 95
-N 15:                              unlimited
> yarn --version
1.22.5

与sudo su:

> sysctl fs.inotify.max_user_watches
fs.inotify.max_user_watches = 524288
> ulimit -a
-t: cpu time (seconds)              unlimited
-f: file size (blocks)              unlimited
-d: data seg size (kbytes)          unlimited
-s: stack size (kbytes)             8192
-c: core file size (blocks)         0
-m: resident set size (kbytes)      unlimited
-u: processes                       63664
-n: file descriptors                1024
-l: locked-in-memory size (kbytes)  2043392
-v: address space (kbytes)          unlimited
-x: file locks                      unlimited
-i: pending signals                 63664
-q: bytes in POSIX msg queues       819200
-e: max nice                        0
-r: max rt priority                 0
-N 15:                              unlimited

Answer 1

我想我找到了解决办法：

在 /etc/sysctl.conf 中设置限制，方法是添加：

fs.inotify.max_user_watches=524288
fs.inotify.max_user_instances=512

打开一个新终端或使用
重新加载sysctl.conf个变量
```
sudo sysctl --system
```
运行 yarn start

希望现在一切正常。如果它不起作用，请尝试将限制设置得更高。

Error: EMFILE: too many open files, watch, unless I use sudo

Error: EMFILE: too many open files, watch, unless I use sudo

watch

ulimit

node.js

描述

信息