php-fpm derinimai

php-fpm turi atskirus failus per user:  /etc/php.d  ten reikai nustatyti server limitus
https://tideways.com/profiler/blog/an-introduction-to-php-fpm-tuning

php session lock

php session  keep locked file until script ends or you call session_write_close();
https://jennifersoft.com/en/blog/tech/2019-04-08/
https://stackoverflow.com/questions/13946033/is-it-recommended-to-store-php-sessions-in-memcache