High load vs Resource usage limited

[sahostking]

Hello!

Now some sites make high load and I have big problems with my customers.
I bough many CloudLinux licenses to prevent that but I see he didn do what CL say.

When a customer use all allocated resources I want to show "Resource usage limited" not the website very very slow.

How can I block this spikes?

Many thanks!

[bogdan.sh]

Hello,

There are many limits and they acts differently when resoruce limit is reached:
- if user hits CPU limit processes within that limit are slowed down
- when LVE tries to allocate more memory (virtual memory) then a limit - the process will fail, for CGI/PHP scripts it will cause error 500 or 503
- same for physical memory limit
- when IO limit is reached the processes are throttled (put to sleep), and last longer
- when NPROC limit is reached no new processes can be created, apache will return error 500 or 503
- when entry process limit is reached website will show error 508 (Resource limit reched)

This is how CloudLinux works, and actually that is correct way to handle all limits.

[contact]

Yes, teoretical is correct. But practical I have many times load more 100.... and in this time very very rarely error 500/503/Resource Limit Reached.