Limit CPU Usage
- Thread starter hami
- Start date
youds
Verified User
I’d suggest using an OS like CloudLinux. https://www.cloudlinux.com/
youds
Verified User
You may try to configure CGroups, but there are no ready interface - all will be coded manually. There is no ready solutions with comfort interface for free.
You can try to limit user load configuring "pm.max_children" if you are using php-fpm, but it will not be correct way to control user's load.
Cloudlinux it is best way now.
If you want to make license (price) impact lower - use one unlimited DA/Cloudlinux license at one powerful server with 500-1000 users, don't use 5 weak servers with 5 licenses and 100-200 users.
True
I like Free as well.
Some say this
The World’s Most Powerful Supercomputer Is an Absolute Beast
Behold Summit, a new supercomputer capable of making 200 million billion calculations per second. It marks the first time in five years that a machine
gizmodo.com
Chinese supercomputer is the world’s fastest — and without using US chips
China now has more of the world’s fastest supercomputers than the US
www.theverge.com
Powerful is usually a vague term.
Not Native supported in Directadmin is the current answer.
youds
Verified User
Yeah, I have to say, if you want this feature CloudLinux is the answer. Not DirectAdmin.
Is cgroups still even a thing? I thought it was phased out starting with CentOS 7 in favor of user slices which doesn't appear to be directly the same thing as cgroups.
It depends on what you want to do with CloudLinux. I saw CloudLinux as a lot of fluff and not a lot of substance. Sure, you can limit CPU, memory, I/O, etc. But if you set these limits too low then you suffer a performance hit. If you raise them to the point that they don't create performance bottlenecks... well, there's not a lot of user hits at those limits, so are you really gaining anything compared to not having CloudLinux? Plus the added cost of a CloudLinux license.
Maybe I did all of my testing wrong - I won't say that I didn't. But I also kind of question whether anybody else ever actually did any testing with CloudLinux vs. non-CloudLinux.
I mean, if you have to set the CloudLinux limit floor so high that it only finds 2 or 3 bad actors on a server of 500, do you really need CloudLinux to be able to identify those accounts?
It depends on what you want to do with CloudLinux. I saw CloudLinux as a lot of fluff and not a lot of substance. Sure, you can limit CPU, memory, I/O, etc. But if you set these limits too low then you suffer a performance hit. If you raise them to the point that they don't create performance bottlenecks... well, there's not a lot of user hits at those limits, so are you really gaining anything compared to not having CloudLinux? Plus the added cost of a CloudLinux license.
Maybe I did all of my testing wrong - I won't say that I didn't. But I also kind of question whether anybody else ever actually did any testing with CloudLinux vs. non-CloudLinux.
I mean, if you have to set the CloudLinux limit floor so high that it only finds 2 or 3 bad actors on a server of 500, do you really need CloudLinux to be able to identify those accounts?
With cloudlinux You give as more resources as you want, like at VPS but for people who don't want to solve server-admin problems.
Also it helps users to optimize their projects, for example I have 2x3GHz, and I know that if I want to make my website work faster - I can optimize it, I can turn on/off modules/plugins, I am protected from neighbors overload etc. Without cloudlinux all my optimization benefits will be shared between all neighbors
Also cageFS gives better isolation from neighbors, and their outdated/hacked scripts.
Mysql Governor nice feature too.
Also if some account/website will be hacked - it will not overload whole server, you can sleep with sweet dreams just checking sometimes monitoring charts.
and all just for 0,33$/day - it's almost free.
Also it helps users to optimize their projects, for example I have 2x3GHz, and I know that if I want to make my website work faster - I can optimize it, I can turn on/off modules/plugins, I am protected from neighbors overload etc. Without cloudlinux all my optimization benefits will be shared between all neighbors
Also cageFS gives better isolation from neighbors, and their outdated/hacked scripts.
Mysql Governor nice feature too.
Also if some account/website will be hacked - it will not overload whole server, you can sleep with sweet dreams just checking sometimes monitoring charts.
and all just for 0,33$/day - it's almost free.
Here:
scoutapm.com
Restricting Process CPU Usage Using nice, cpulimit, and cgroups
There are at least three ways in which you can control how much CPU time a process gets: Use the nice command to manually lower the task's priority; use the cpulimit command to repeatedly pause the process so that it doesn't exceed a certain limit; use Linux's built-in control groups, a...
scoutapm.com
hami
Verified User
- Joined
- Sep 7, 2013
- Messages
- 22
My Mean is that how much CPU and Ram and HDD Type.Some say this
or thisThe World’s Most Powerful Supercomputer Is an Absolute Beast
Behold Summit, a new supercomputer capable of making 200 million billion calculations per second. It marks the first time in five years that a machine
Powerful is usually a vague term.Chinese supercomputer is the world’s fastest — and without using US chips
China now has more of the world’s fastest supercomputers than the US
That should be determined by the need of the application and its expected workload.
example
DNS server specs vs a webserver vs a DB server are all different. There is no silver bullet answer.
I seem to agree. I can't seem to validate the cost. I never could even get interested enough to use it. I also used to like KernelCare but they don't support Centos 8 as well as 7.
skhristich
Verified User
- Joined
- Jul 15, 2019
- Messages
- 20
Hello,
You can use a trial version of CloudLinux for a month and try it atwork. Thank you
You can use a trial version of CloudLinux for a month and try it atwork. Thank you
Ever tried kexec instead of KernelCare?
Hello. KernelCare supports CentOS8 as far as I can see from the page https://patches.kernelcare.com/#CentOS 8 (x86_64)# We are planning to use it for CentOS8, did you have any mistakes with it?
I have not. Is it similar? I can add this to my research list.
They could be now. I few months back seems like I got kernel not supported a lot. I need to go see if it’s better.
I like the idea but if I am paying money it should just work.
I use it on Debian servers now too. That seems to work fine.
Well, it's a bit more basic. But I succeeded in activating a new kernel on a running vps and all services restarted. It has been running for a few months without issues.