Nginx prompt: Too program open files solution

If nginx error. log contains a large number of Too Upload open files, it indicates that the file handle is not enough. In this case, we need to increase the number of file handles in the system and the maximum number of connections allowed by nginx.

By default, the maximum number of files that can be opened in a linux file system is 1024. For a server used in a production environment, this setting is too low, for example, using nginx as a web server, when the concurrency reaches a certain number, you can see the error. log contains a large number of "Nginx accept () failed (24: Too open files)" errors. There are two solutions to this problem:

Method 1: use ulimit-n 655350 to set the maximum number of opened files to 655350. You also need to modify the nginx configuration file and set worker_rlimit_nofile to the same value.

1. Change the system file handle

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Vi/etc/security/limits. conf

Add the following content:

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Root soft nofile 10240 Root hard nofile 10240 Nobody soft nofile 10240 Nobody hard nofile 10240

Generally, we only need to increase the number of file handles for the root user and the nginx running user nobody. If you need to increase this value for each user, you can add the following content:

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* Soft nofile 10240 * Hard nofile 10240

Note: modifying the file opening limit through ulimit only affects the current shell environment. Therefore, this is a temporary solution. The ultimate solution is Method 2.

Method 2: Add the following information to the/etc/security/limits. conf file:

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* Soft nofile 655360 * Hard nofile 655360

2. Change the nginx. conf parameter.

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Vi/etc/nginx. conf

Find the worker_rlimit_nofile and worker_connections parameters and change the value:

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Worker_rlimit_nofile 10240; Worker_connections 10240;

3. Restart nginx

Nginx-s reload
In this way, the new maximum number of allowed connections takes effect.

4. Check error. log to see if there is any Too program open files information. If there are still a large number of such errors, continue to increase the number of file handles according to the above steps.

Note: After this method is modified, you must restart the machine to make it take effect.