Ensure minimal performance for UI/system

[iTrooz]

Hi !
Today, I’ve pushed my system to it’s maximum (VMs + big compilation operation) and my UI (KDE) started to lag, to finally freeze.
I’m not really surprised because I was using 99.3% of CPU, and like 95% of RAM.
Nevertheless, I’d like to know if I can ensure that my system/UI/other important processes (like a task manager I would have liked to launch) will always get resources to run.

I know about “process priority” (even though I’m not sure this is what I’m looking for), but I’d like a way to “prioritize” a whole binary more than a process

Do you know if this is possible ?
(I don’t know if this is the right place to ask, feel free to redirect me to the right category/forum for this !)

[dmt]

@iTrooz

Today, I’ve pushed my system to it’s maximum (VMs + big compilation operation) and my UI (KDE) started to lag, to finally freeze.

Do you have swap?

https://wiki.manjaro.org/index.php?title=Swap
https://wiki.archlinux.org/index.php/Swap

[iTrooz]

No, I don’t have Swap, I can add some, but do you really think that’s what I need ? My CPU also had this “problem”, I don’t think expanding my RAM will fix it

And I’d really like to just ensure theses minimal resources, because everything can happen, maybe tomorrow it’ll be a bugged program that will consume everything if not restricted, or… I don’t know, many things can happen, and I’d like to keep control on my system in theses cases

But thanks for your response, I’ll try it !

[dmt]

@iTrooz

95% of RAM.

So yeah it should help

@iTrooz

ensure that my system/UI/other important processes (like a task manager I would have liked to launch) will always get resources to run.

Of course it won’t help your CPU, or much else, but it should ensure you don’t experience a freeze/crash because you ran out of ram.

[Yochanan]

Your topic title doesn’t really make any sense in the context of your post.

@iTrooz

I’d like a way to “prioritize” a whole binary more than a process

What does that mean? A process is started by a binary.

See Improving Performance: Adjusting priorities of processes

[bogdancovaciu]

If the above doesn’t help, see here

[HowTo] deal with low memory before it becomes a problem

Difficulty: ★☆☆☆☆ You have a PC. It often hangs or slows down terrifically, you cannot even move the cursor on the screen, you wait 5 minutes for the system to defrost from its cryogenic state. You tell yourself “maybe 200 tabs was too much…” But in life, there’s hope. Hope for a magical solution to appear right in front of you, as if the sky gifted you magnificence. Here is that solution. It is called Earlyoom. Yes, my friends, easiness never has been so easy! “Okay, but what does that rando…

[iTrooz]

Yeah, a process is started by a binary. So by prioritizing a binary, I would like all process started by this binary to be prioritized
Of course, I don’t know if it exists, but in theory it is possible, right ?

[iTrooz]

Okay, I’ll try it, thanks

[freggel.doe]

Your post reads as if memory exhaustion was your problem. Process priorities won’t/can’t help you there.

@iTrooz

I would like all process started by this binary to be prioritized

You might want to take a look at cgroups.

[iTrooz]

I just had the same problem today, but only my CPU was 100%, so now I’m sure that “fixing” only RAM will not fix the problem.

@freggel.doe

You might want to take a look at cgroups.

Okay, I’ll check it out tomorrow !