zmts/File_descriptor.md

## File_descriptor.md

      
    Raw
  

              File_descriptor.md
            
          
    Lack of of file descriptors; Too many open files; Mac OS;

Mac OS X Catalina

Issue:

ab -c 300 -n 1000 https://super.com/api

This is ApacheBench, Version 2.3 <$Revision: 1843412 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking super.com (be patient)
socket: Too many open files (24)

Solution:

> 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
-v: address space (kbytes)          unlimited
-l: locked-in-memory size (kbytes)  unlimited
-u: processes                       2784
-n: file descriptors                256

Increase file descriptors (it will applied not permanently, it will dropped out on reboot):
> ulimit -n 2048
-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
-v: address space (kbytes)          unlimited
-l: locked-in-memory size (kbytes)  unlimited
-u: processes                       2784
-n: file descriptors                2048

https://en.wikipedia.org/wiki/File_descriptor