qmemman should do everything it can to avoid swapping in VMs

[marmarek]

Reported by joanna on 23 Jul 2011 18:33 UTC
When an AppVM starts using its swap (as seen via free) it slows down dramatically...

Migrated-From: https://wiki.qubes-os.org/ticket/308

[marmarek]

Comment by rafal on 25 Jul 2011 07:51 UTC
Any more precise suggestions ?
If VM starts swapping, it means qmmeman is not able to give it more memory, because other domains are already not above their preferred memory size. In such condition, if we take memory from some other VM, this other VM can start swapping, too.

[marmarek]

Comment by rafal on 25 Jul 2011 07:51 UTC
Any more precise suggestions ?
If VM starts swapping, it means qmmeman is not able to give it more memory, because other domains are already not above their preferred memory size. In such condition, if we take memory from some other VM, this other VM can start swapping, too.

[marmarek]

Comment by joanna on 25 Jul 2011 08:21 UTC
Such as: determine if there are "unused" AppVMs running (unused =def= those that have not got any GUI window displayed for the last N minutes), and shut them down.

It really gets easy to end up having some ten or more AppVMs running, while most of them not used at all for a few days.

The price we pay is that perhaps the user would need to wait some... 12 secs when starting an app from one of those closed AppVMs -- but we minimize chances of one of the used AppVMs to become effectively unusable.

Moving this to Beta 3. Perhaps this would nicely fit into ticket #207.

[marmarek]

Comment by joanna on 25 Jul 2011 08:21 UTC
Such as: determine if there are "unused" AppVMs running (unused =def= those that have not got any GUI window displayed for the last N minutes), and shut them down.

It really gets easy to end up having some ten or more AppVMs running, while most of them not used at all for a few days.

The price we pay is that perhaps the user would need to wait some... 12 secs when starting an app from one of those closed AppVMs -- but we minimize chances of one of the used AppVMs to become effectively unusable.

Moving this to Beta 3. Perhaps this would nicely fit into ticket #207.

[marmarek]

Modified by joanna on 25 Jul 2011 08:21 UTC

[marmarek]

Modified by joanna on 25 Jul 2011 08:21 UTC

[marmarek]

Modified by joanna on 25 Sep 2011 10:53 UTC

[marmarek]

Modified by joanna on 25 Sep 2011 10:53 UTC