How to share the load wisely?

Question

PHP

Initial data: at the front of physical. nginx server, under it php-fpm, mysql database, task manager using redis, php application. One part of the application pulls data from the database and gives a response to nginx, the second part receives tasks from redis and executes them (text parsing + reading / writing to innodb tables). Here is the second part of the problem. It is very resource-intensive and loads the protsik in full. The first part at this time, of course, cannot process nginx requests.
Any advice on how to proceed wisely in this case?

Answer 1

nice
cgroups

Answer 2

Go aside or virtualization to control resources, or scale the number of physical. servers, parallel or distribute across tasks.