Re: Swap usage with KVM

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On 07/11/2010 03:12 PM, Daniel Bareiro wrote:
On Sunday, 11 July 2010 12:12:57 -0300,
Daniel Bareiro wrote:

I have an installation with Debian GNU/Linux 5.0.4 amd64 with qemu-kvm
0.12.3 compiled with the source code obtained from the official site
of KVM and Linux 2.6.32.12 compiled from source code of kernel.org.
All this is installed on an HP Proliant DL380 G6 with two Xeon E5530
quadcore processors and 16 GiB of RAM which has two VMs with the
following configuration of memory:

Hostname       |      RAM
===============+===============
Aps4           |    7 GiB
Leela          |    7 GiB
===============+===============
TOTAL          |   14 GiB

Initially the host was created with a swap partition of 1 GiB, but
today we found that the use of swap quickly began to grow
increasingly.  Therefore, as a contingency, we had to hot-add a
logical volume of 1 GB of swap on the VMHost. Is 'normal' this use of
memory?

That depends on what is going on in the host.

Did you notice any performance issues in the guest when
you started using swap?

Has anyone experienced something like this? Avi? I remember late last
year there was a regression in Linux swapping and Rik and Hugh were
working on it. Are you aware of any?

That one should have been fixed.

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