PHP-FPM settings

PHP-FPM settings

PHP-FPM settings tutorial. max_servers, min_servers, etc.
echo Cores = $(( $(lscpu | awk '/^Socket/{ print $2 }') * $(lscpu | awk '/^Core/{ print $4 }') ))

When you run the Linux command above, you will get something like “Cores = 4”.
ps --no-headers -o "rss,cmd" -C php-fpm7.2 | awk '{ sum+=$1 } END { printf ("%d%s\n", sum/NR/1024,"M") }'

When I ran the command above, I got 29M.

/etc/php/7.2/fpm/pool.d/www.conf

pm.max_children
pm.start_servers
pm.min_spare_servers
pm.max_spare_servers
pm.max_children

In my case, I want to allocate 4GB (4000MB) and each process consumes about 29MB.

Divide 4000 by 29 and you get around 138.

pm.max_children to 138.
pm.start_servers = 16
pm.min_spare_servers = 32

pm.max_spare_servers = 8

So I set pm.max_spare_servers to 16, the same value that I used for pm.start_servers.

Restart PHP FPM.
For these changes to take effect, you will need to restart PHP FPM.