Configuring the maximum number of Nginx worker processes
##worker_processes: The maximum number of worker processes
##work_connections: Each worker process The number of external connections that can be allowed to be established simultaneously. Modify the maximum number of files that can be openedChange the setting of the "maximum number of files that can be opened by a process" of the operating system
First, you need root permissions of the operating system , then you need the limits.conf main configuration file:[root@localhost /]# vim /etc/security/limits.conf
* soft nofile 65535 * hard nofile 65535
soft (application software) level limit on the maximum number of open files.
hard means the operating system level limit on the maximum number of open files.
* means it is valid for all users.
ulimit -n 65535
[root@localhost /]# ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 14989 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 65535 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 14989 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited
Change Nginx "Maximum number of open files for a process" Settings
Open nginx.conf and match the worker_rlimit_nofile attribute.#user nobody; worker_processes 4; #error_log logs/error.log; #error_log logs/error.log notice; #error_log logs/error.log info; #pid logs/nginx.pid; events { use epoll; worker_connections 65535; }
Verify whether Nginx's "maximum number of open files for a process" works
In Linux, all processes will have a temporary core configuration file description and storage path In /proc/process number/limit[root@localhost sbin]# ps -aux|grep nginx root 1733 0.0 0.0 32816 1792 ? Ss 17:38 0:00 nginx: master process ./nginx nobody 1734 0.0 0.7 59952 29184 ? S 17:38 0:00 nginx: worker process nobody 1735 0.1 0.7 59952 29184 ? S 17:38 0:00 nginx: worker process nobody 1736 0.2 0.7 59952 29184 ? S 17:38 0:00 nginx: worker process nobody 1737 0.1 0.7 59952 28928 ? S 17:38 0:00 nginx: worker process root 1739 0.0 0.0 112824 980 pts/0 S+ 17:38 0:00 grep --color=auto nginx [root@localhost sbin]# cat /proc/1734/limits Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size 0 unlimited bytes Max resident set unlimited unlimited bytes Max processes 14989 14989 processes Max open files 65535 65535 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 14989 14989 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us
Max client calculation method
#充当服务器时Nginx可同时承载的连接数量,是最大工作线程*每个线程允许的连接数量 max_client = worker_processes * worker_connections #充当反向代理服务时,可同时承载的连接数量是最大工作线程*每个线程允许的连接数量/4 #(4)代表:浏览器会建立两条连接到Nginx,Nginx也会建立两条连接到后端服务器。这样就是4条了。 max_client = worker_processes * worker_connections/4
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