CPU Usage

Daveyz83

I read from one of the replies in the forum that PHP will actually maximise the CPU usage of the server, meaning if it is the only user on the server, it will use up 90% of the CPU which is very common.

My question is, is there anyway(through configuration file or something) that I can actually restrict or limit my cpu usage to the php script? So that it WILL NOT maximise the 90% CPU usage.

Regards
Daveyz

Weedpacket

Is there any particular reason why you'd want to do this? If no-one else is using the CPU at that particular moment, then what's wrong with PHP using all of it? All throttling it would achieve would be to make it run more slowly.

Since PHP usually runs as part of the server, restricting PHP's processor usage would be dependent either on what particular server you're using (if it allows such throttling), or, depending on your system, throttling the performance of the entire server.

Daveyz83

Would hogging on to 90% of the CPU affect other users from running processers?

I am writing a socket server using php and its going to be running in the background 24/7. 90% CPU would mean a problem to the other processers, unless php does know when to release cpu usage when other processers needs it.

Another thing is that I am running on a shared box, 90% usage on the "top" command might mean that my processers might be killed by the system admin simply because it means "resource hogging".

I need a solution to that problem, unless wad I question about releasing of resources is working..

diego25

I'm sorry I don't the answer to your specific question. But I have a warning though: Most hosts don't allow you to run scripts that will run 24/7. So if you make one, even if it only eats 5% of the processor time, you'll get in trouble with your hosting company.

Diego

Daveyz83

Thanks diego I've already took care of that, I just need to bring my CPU % that is shown on "top" to be below 10% at least..