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System performance is not OK.

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hack3rcon
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System performance is not OK.

#1 Post by hack3rcon »

Hello,
When I want to open some files together then my system hanged. For example, I'm downloading a file and played a song and launch a VM then music interrupted and system hanged for some minutes. My system is Core i7 and have 16 GB of RAM. I have enough free space too.
How can I troubleshooting it? I checked by "iotop" or "htop" commands, but not found anything odd.

Thanks.

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ruwolf
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Re: System performance is not OK.

#2 Post by ruwolf »

What does your abbreviation VM mean?

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Re: System performance is not OK.

#3 Post by CwF »

Don't use Virtual Box and don't provision all the cpu's to the the vm?

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Head_on_a_Stick
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Re: System performance is not OK.

#4 Post by Head_on_a_Stick »

hack3rcon wrote:I checked by "iotop" or "htop" commands
Was there much memory free?

Code: Select all

free -h
@ruwolf: "VM" is short for Virtual Machine, the OP is probably using VirtualBox (sadly).
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Re: System performance is not OK.

#5 Post by stevepusser »

Yes, the system "hanging" for a few minutes and then recovering matches what happens when it runs out of free RAM and has to resort to swapping to the hard disk for a period.

There are several ways to keep an eye on used RAM--I prefer to have a widget on the taskbar that shows it, updated every second. What widget is right for you depends on your desktop.
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hack3rcon
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Re: System performance is not OK.

#6 Post by hack3rcon »

My system has enough free memory:

Code: Select all

$ sudo free
              total        used        free      shared  buff/cache   available
Mem:       16274948     8001252     1824336      133008     6449360     7893208
Swap:       8795132       15304     8779828
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Re: System performance is not OK.

#7 Post by Deb-fan »

Check logs for one. Like "journalctl -p 3". Do 2 and 1 with it too. Would also help if you gave more info about your hardware. Many ways to do it and much software for gnu/nix available for the purpose ie:inxi etc etc. Somebody might spot a problem child component or whatever else. Lastly would definitely advise lowering your swappiness to 10. Edit the /etc/sysctl.conf file and put this at the bottom.

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# Lower swap to a more reasonable level 
vm.swappiness=10
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Zjho
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Re: System performance is not OK.

#8 Post by Zjho »

If a solid state drive is used try also every so often :

Code: Select all

fstrim -v /

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Re: System performance is not OK.

#9 Post by pcalvert »

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phenest
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Re: System performance is not OK.

#10 Post by phenest »

Some here have suggested your VM might be to blame. Regardless of which software you use for that, have you allocated RAM sensibly for it and not handed over a huge amount?

Also, does this only happen when you use a particular program (i.e. your VM) or any of them? Try to narrow it down through observation in case it's just one piece of software or combinations.
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