Limit CPU usage per each php-fpm instance

[Spacedust]

Is this possible ?

We have some customers using more than 300% of 8 threads :/

[insanity]

Use cgroups and create group only for these clients.
We use it for apache, because sometimes apache use more than 600% cpu and everything freeze...

[Spacedust]

Use cgroups and create group only for these clients.
We use it for apache, because sometimes apache use more than 600% cpu and everything freeze...

I use some anti overload scripts when load is getting too high ex. 70 or more than apache and all php-fpm processes are killed to prevent server freeze I leave it on screen to check each second.

[insanity]

If we kill apache and fpm all customers will start call us
Thats why we use cgroups for all these process. eg, Apache, nginx, qmail, fpm, mysql
Yes sometimes its slower than usual but it is stable.

[chrisf]

@insanity, could you give a detailed description on how to setup cgroups for Apache, or whatever process, how to add users to that group, etc.

[fossxplorer]

Yes, i would be interested to test out resource limiting by cgroups as well.
IIRC, cgroups is indeed used by LInux containers

[Spacedust]

He is using probably CloudLinux which I hate.

[MRatWork]

What about https://www.rfxn.com/projects/system-priority/ ?. Look like very simple.

[insanity]

Actually i'm not using cloudlinux. Only cgroups

Its simple. Install cgroups: yum install libcgroup

Here is my limit for apache:
/etc/cgconfig.conf

Code: [Select]

mount {
cpuset = /cgroup/cpuset;
cpu = /cgroup/cpu;
cpuacct = /cgroup/cpuacct;
}
group apache {
cpu {
cpu.cfs_quota_us="25000";
cpu.cfs_period_us="10000";
}
cpuacct {
cpuacct.usage="0";
}
cpuset {
cpuset.cpus="0,1,2,3,4,5,6,7";
}
}

/etc/cgrules.conf

Code: [Select]

apache cpu,cpuacct,cpuset apache/


Code: [Select]

/etc/init.d/cgconfig start
/etc/init.d/cgred start

This conf limit my apache at 250% and allow to use 8 cpu cores

[Spacedust]

Good idea, but I think it's a bit useless. I do not wan't to limit Apache itself but to lock some users from hogging all my CPU power.