System performance is not OK.

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System performance is not OK.

Postby hack3rcon » 2019-08-05 11:20

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.

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Re: System performance is not OK.

Postby ruwolf » 2019-08-05 12:00

What does your abbreviation VM mean?
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Re: System performance is not OK.

Postby CwF » 2019-08-05 13:11

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

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Re: System performance is not OK.

Postby Head_on_a_Stick » 2019-08-05 14:55

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.

Postby stevepusser » 2019-08-05 16:20

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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Re: System performance is not OK.

Postby hack3rcon » 2019-08-10 11:27

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.

Postby Deb-fan » 2019-08-10 12:48

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.
Code: Select all
# Lower swap to a more reasonable level
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Re: System performance is not OK.

Postby Zjho » 2019-08-12 05:18

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.

Postby pcalvert » 2019-08-13 00:53

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Re: System performance is not OK.

Postby phenest » 2019-08-13 06:45

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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