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This article mainly introduces "how to set the number of Nginx server processes and the method of using multicore CPU". In daily operation, I believe many people have doubts about how to set up the number of Nginx server processes and how to use multicore CPU. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to set the number of Nginx server processes and how to use multicore CPU". Next, please follow the editor to study!

Nginx profile nginx.conf

First of all, you need to find the configuration file nginx.conf of nginx to do the following. Under the default configuration of the lnmp one-click installation package, nginx.conf is stored in the

/ usr/local/nginx/conf/nginx.conf

As for installing nginx in other environments, you can use

Find /-name nginx.conf

To find the path where the configuration file is stored.

Number of nginx worker_processes processes settin

In nginx's configuration document nginx.conf, you can set worker_processes to change the number of processes in nginx. According to this Q & A number of nginx worker processes, it is recommended that the number of nginx worker_processes processes be set to 1, because:

But our goal is to assign different worker_processes processes to run on different cores, so take the 512 configuration of my current vps provider linode as an example, the server hen has eight logical cpu, but as a user I only get four logical cpu, so here I am set to run three worker_processes processes, because by default, other programs will run on the first logical cpu (cpu0). In order not to affect other programs, I will assign these three processes to run on the other three logical cpu (cpu1, cpu2, cpu3):

Worker_processes 3

Generally speaking, if you have a few logical cpu, it is appropriate to set it to a few worker_processes, but it doesn't make much sense if you have more than 8 worker_processes. The reason has already been mentioned in the above paragraph.

You can use this command to view the current cpu situation:

Cat / proc/cpuinfo

Or directly display the number of logical cpu:

Cat / proc/cpuinfo | grep "processor" | wc-l

Nginx worker_cpu_affinity Settin

According to the data on nginx wiki:

Worker_cpu_affinity is not enabled by default. According to the example, we can see that 0001 0010 0100 1000 represents the 1st, 2nd, 3rd and 4th logical cpu respectively, so we can set 0010 0100 1000 to bind the three processes to the 2nd, 3rd and 4th logical cpu respectively:

Worker_processes 3 workerplate CPUs 0010 0100 1000

At the same time, according to the example, we can see that worker_cpu_affinity can bind the same process to two logical cpu:

Worker_processes 2 workerplate CPUs 0101 1010

0101 on the 1st and 3rd logical cpu, 1010 is on the 2nd and 4th logical cpu.

Enabling and testing of nginx process allocation to multicore cpu settings

Save the nginx.conf file and reload the nginx configuration file:

/ usr/local/nginx/sbin/nginx-s reload

Run ab on another host with apache installed to test:

Ab-n 20000-k http://www.1990y.com/p.php

You can test a php page that requires a mysql query, or you can test a static image or page.

On the server under test, you can use top to view the current server situation, and then press 1 to display the usage of each logical cpu.

Turn on cpu multi-core utilization

Rule setting

(1) there are several digits of the number of cores in cpu. 1 indicates that the kernel is on, and 0 indicates that the kernel is closed.

(2) when a maximum of 8 worker_processes is enabled, the performance of more than 8 will not be improved, and the stability will become lower, so 8 processes are sufficient.

Demo example

Start two processes with two cores of cpu

Worker_processes 2; worker_cpu_affinity 01 10

01 indicates that the first cpu kernel is enabled, and 10 indicates that the second cpu kernel is enabled

Worker_cpu_affinity 01 10; indicates that two processes are started, the first process corresponds to the first cpu kernel and the second process corresponds to the second cpu kernel

Start eight processes with two cores of cpu

Worker_processes 8; worker_cpu_affinity 01 10 01 10 01 10 01 10

Eight processes are started, each of which corresponds to opening two kernels

8-core cpu, start 8 processes

Worker_processes 8; worker_cpu_affinity 10000000 01000000 00100000 00010000 00001000 0000010000001000000001

00000001 means that the first cpu kernel is enabled, 00000010 means that the second cpu kernel is enabled, and so on

8-core cpu, start 2 processes

Worker_processes 2; worker_cpu_affinity 10101010 01010101

10101010 means the kernel 2, 4, 4, 6, and 8 is enabled, and 01010101 means that the kernel 1, 3, 5, and 7 is started.

2 processes correspond to 8 cores

Restart nginx

After the configuration is complete, you need to restart the nginx service

/ etc/init.d/nginx restart at this point, the study on "how to set up the number of Nginx server processes and how to use multicore CPU" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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