‘m getting the following error in my nginx server error log file:
2010/04/16 13:24:16 [crit] 21974#0: *3188937 open() “/usr/local/nginx/html/50x.html” failed (24: Too many open files), client: 88.x.y.z, server: example.com, request: “GET /file/images/background.jpg HTTP/1.1”, upstream: “http://10.8.4.227:81//file/images/background.jpg”, host: “example.com”
How do I fix this problem under CentOS / RHEL / Fedora Linux or UNIX like operating systems?
Linux / UNIX sets soft and hard limit for the number of file handles and open files. You can use ulimit command to view those limitations:su - nginx
To see the hard and soft values, issue the command as follows:ulimit -Hn
ulimit -Sn
Increase Open FD Limit at Linux OS Level
Your operating system set limits on how many files can be opened by nginx server. You can easily fix this problem by setting or increasing system open file limits under Linux. Edit file /etc/sysctl.conf, enter:# vi /etc/sysctl.conf
Append / modify the following line:fs.file-max = 70000
Save and close the file. Edit /etc/security/limits.conf, enter:# vi /etc/security/limits.conf
Set soft and hard limit for all users or nginx user as follows:
nginx soft nofile 10000 nginx hard nofile 30000
Save and close the file. Finally, reload the changes with sysctl command:# sysctl -p