[humanpuff69]

long time not making any tutorial . but i think now is the time

short background . recently my web backend for my android application exploded in popularity and because of that my vps cannot handle it . it starting to give error 500 , 520 , 502 , etc . after some finding i found out the cause to be the php-fpm that limit the processing power and make my site giving that error . i use php for backend simply because i dont know python,nodejs,etc

to fix it edit the www.conf file in /etc/php/{php version}/{apache or fpm(nginx)}/pool.d/www.conf . for example i use php7.0 and nginx so i use

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nano /etc/php/7.0/fpm/pool.d/www.conf

now edit some variable on that www.conf file and find this variable and then change it like this

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pm = dynamic
pm.max_children = 100
pm.start_servers = 100
pm.min_spare_servers = 25
pm.max_spare_servers = 100

and then find the pm.max_request and remove the ';'

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pm.max_request = 500

now restart the php-fpm using

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service php7.0-fpm restart (depend on what php version you are using)

and after that i get the error much less but still slowdown mostly because of the traffic . it not totally fix it for me but enough to be usable . hope you find this tutorial useful