Try To Optimizing php-fpm7.3 Configuration with NGINX

See the file of configuration on

vi /etc/php/7.3/fpm/pool.d/www.conf

1. pm.max_children

You need to divided by 2. Why? Because your server won’t server all process only for php-fpm, so my calculate is half RAM of the server needed for other processes. Then divided by per php-fpm process 30~40MB

Check Memory:

free -m

Check php-fpm process:

ps --no-headers -o "rss,cmd" -C php-fpm7.3 | awk '{ sum+=$1 } END { printf ("%d%s\n", sum/NR/1024,"Mb") }'

Example:
Server RAM = 4GB

4GB / 2 / 30MB = 66~

2. pm.start_servers

I multiply the server number of cores by 4

Example:
Server Core = 2

2 x 4= 8

3. pm.min_spare_servers

I multiply the server number of cores by 2

Example:
Server Core = 2

2 x 2= 4

4. pm.max_spare_servers

I multiply the server number of cores by 4

Example:
Server Core = 2

2 x 4= 8

And then restart / reload the php by

sudo service php7.3-fpm restart

PHP-FPM: Configuration the Listen Directive

PHP-FPM: Process Management

PHP-FPM: Multiple Resource Pools