[ovirt-users] Memory and swap issue
Itamar Heim
iheim at redhat.com
Thu Jun 5 15:34:25 EDT 2014
On 06/05/2014 10:30 PM, Jeff Clay wrote:
> 126455 MB total, 863 MB used, 125592 MB free
> That's what I'm showing right now, but I don't have as many VM's
> running at the moment. There are currently 8 running and I was getting
> that issue yesterday when I got around the 15 vm mark.
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> On Thu, Jun 5, 2014 at 2:07 PM, Itamar Heim <iheim at redhat.com
> <mailto:iheim at redhat.com>> wrote:
>
> On 06/05/2014 02:24 AM, Jeff Clay wrote:
>
> I'm getting the following error trying to start a VM. I have 64
> gb of
> RAM on this host. I got this error once before and found that my
> swap
> partition was only 2gb or so. I increased the swap size to 124GB
> and the
> problem went away. Below is the error when trying to start a VM and
> below that is what my output from "free -g". I don't see why I'm
> getting
> a swap file error when there's plenty of it available.
>
>
> * Cannot run VM. Host swap percentage is above the defined
> threshold.
>
> - Check your configuration parameters for Host Swap Percentage.
> * Cannot run VM. There is no host that satisfies current
> scheduling
>
> constraints. See below for details:
> * The host USARPAOVRTHOST02 did not satisfy internal filter
> Memory.
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> [root at usarpaovrthost02 ~]# free -g
> total used free shared buffers
> cached
> Mem: 62 62 0 0 0
> 12
> -/+ buffers/cache: 50 12
> Swap: 123 12 110
> [root at usarpaovrthost02 ~]#
> [root at usarpaovrthost02 ~]#
> [root at usarpaovrthost02 ~]# swapon -s
> Filename Type Size Used
> Priority
> /dev/dm-1 partition 129490936
> 12811000 -1
> [root at usarpaovrthost02 ~]#
>
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>
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>
> what do you see under host general subtab for swap percentage?
>
>
iirc, you can either disable the swap check via the config
EnableSwapCheck, or change the threshold via
BlockMigrationOnSwapUsagePercentage
(which would be a confusing name if it affects RunVm and not only
migration...)
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