Nginx too many open files com . conf (if using RHEL-based linux). I initially thought it is a self-imposed limit of nginx, but it increases limit per process: How to fix 'too many open files' and 'too many open connections' errors in Nginx and increase performance for file serving and proxying. You can correct this by increasing the following variable: worker_rlimit_nofile <enter value under certain load conditions following message could be seen in nginx's error log file: "Too many open files" what are the best practices in settings limit for nginx Oct 10, 2020 · The easiest way to apply updated ulimit - reboot. conf $ sudo Sep 13, 2019 · Sep 13 05:32:22 pars. Solves the logged event Mar 13, 2024 · Very often ‘ too many open files ’ errors occur on high-load Linux servers. service" and "journalctl -xeu nginx. service" for details. open_file_cache Tuning: My current open_file_cache settings are clearly too aggressive and caused the problem. pid: Too many open files To solve the problem, you need to raise the number of inotify watches the system has available. Sep 12, 2017 · The ulimit you are checking is for root user probably. service's PID file /var/run/nginx. " May 9, 2019 · How to solve Nginx running into a max open files limit. Jul 23, 2025 · File descriptors are used to represent open files, sockets, or other I/O resources. For Nginx, a high maximum open file limit is essential, especially in scenarios with high traffic or many concurrent connections. Try using sudo -u www-data bash -c "ulimit" Tarun Lalwani – Tarun Lalwani 2017-09-12 11:29:31 +00:00 CommentedSep 12, 2017 at 11:29 @TarunLalwani It says: unlimited MrRP – MrRP 2017-09-12 12:33:23 +00:00 CommentedSep 12, 2017 at 12:33 Related: serverfault. In this article, we’ll look at how to check the current limits on the maximum number of open files in Linux Dec 15, 2024 · I runs a busy website and had an issue with nginx not being able to handle the connection. For a workload of millions of tiny, static files, what would be considered a good configuration for max, inactive, and min_uses? Feb 17, 2020 · [I posted this on the Nginx forums, but had no responses a week later, so trying here] I am a Linux and Nginx novice, but have learnt enough to get it installed and running and working as a simple "Troubleshoot and resolve the ""Too many open files"" error preventing nginx from starting or reloading on a Plesk server. May 6, 2010 · Learn how to fix the common Nginx error "Too many open files" by increasing the file descriptor limits at system, OS and Nginx levels. Aug 9, 2025 · 3. If you can't easily reboot (for example if this is a production server) try answers from this question. This limit impacts the web server's ability to efficiently handle multiple requests concurrently. file-max kernel parameter. See "systemctl status nginx. Mar 13, 2018 · Issue nginx 24: Too many open files sebgonzes Mar 13, 2018 nginx error too many open files S Apr 17, 2024 · But why would too many files be open? You need to investigate that rather than trying to increase the limit. Follow the steps to increase the file descriptor limit, the worker_rlimit_nofile value, and the fs. See the steps for Linux, UNIX and systemd init systems with examples and screenshots. Mar 23, 2023 · 自建CDN节点遇"Too many open files"错误，原因为ulimit限制与nginx配置冲突。通过调整ulimit -n至65535并修改nginx. What this means is that nginx has too many open connections and can not serve out any more requests. You run nginx workers as www-data so you need to check ulimits for that user. Step 1 – Edit sysctl. This is a snippet of the error: 2024/12/15 19:46:08 [alert] 34526#34526: *129729 socket() failed (24: Too many open files) while connecting to upstream Solution: The values being used are according to my preference. Aug 11, 2025 · Fix Nginx's 'Too many open files' error. For nginx simply editing nginx. Feb 6, 2024 · Job for nginx. It means that a process has opened too many files (file descriptors) and cannot open new ones. conf的worker_rlimit_nofile参数，可解决文件描述符不足问题，提升服务稳定性。 Sep 4, 2015 · 2 Too many open files means that you have hit the ulimit variable for nginx defined by the default in /etc/nginx/nginx. On Linux, the “max open file limit” is set by default per process or user and the values are rather small. service failed because the control process exited with error code. Dec 4, 2023 · Learn the causes and solutions of the common Nginx error that occurs when the system reaches its limit for the maximum number of open file descriptors. conf and setting worker_rlimit_nofile should change the limitation. You can adjust them according to your requirements. work systemd[1]: Failed to set a watch for nginx. Learn why it happens and how to increase file descriptor limits for optimal performance. qwbp mrja szkj tsoh sxjcz qjqgud iyltkwf brus hpzcur lkjj vkrza javhgid dddpd lsrpt nrad