[ovirt-users] memory leak in 3.5.6 - not vdsm

Fri Jan 22 21:08:10 UTC 2016

Hi Nir -

Thanks for getting back to me. Will the patch to 3.6 be backported to 3.5?
As you can tell from the images, it takes days and days for it to increase
over time. I also wasnt sure if that was the right bug because VDSM memory
shows normal from top ...

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND

  5134 vdsm       0 -20 4368m 111m  10m S  2.0  0.3   3709:28 vdsm

Res is only 111M. This is from node1 which is showing currently 20GB of
32GB used with only 2 VMs running on it - 1 with 4G and another with ~1 GB
of RAM configured

The images are from nagios and the value here is a direct correlation to
what you would see in the free command output. See below from an example of
node 1 and node 2

[compute[root at node1 ~]$ free
             total       used       free     shared    buffers     cached
Mem:      32765316   20318156   12447160        252      30884     628948
-/+ buffers/cache:   19658324   13106992
Swap:     19247100          0   19247100
[compute[root at node1 ~]$ free -m
             total       used       free     shared    buffers     cached
Mem:         31997      19843      12153          0         30        614
-/+ buffers/cache:      19199      12798
Swap:        18795          0      18795

And its correlated image http://i.imgur.com/PZLEgyx.png (~19GB used)

And as a control, node 2 that I just restarted today

[compute[root at node2 ~]$ free
             total       used       free     shared    buffers     cached
Mem:      32765316    1815324   30949992        212      35784     717320
-/+ buffers/cache:    1062220   31703096
Swap:     19247100          0   19247100
[compute[root at node2 ~]$ free -m
             total       used       free     shared    buffers     cached
Mem:         31997       1772      30225          0         34        700
-/+ buffers/cache:       1036      30960
Swap:        18795          0      18795

And its correlated image http://i.imgur.com/8ldPVqY.png  (~2GB used). Note
how 1772 in the image is exactly what is registered under 'used' in free
command

On Fri, Jan 22, 2016 at 3:59 PM, Nir Soffer <nsoffer at redhat.com> wrote:

> On Fri, Jan 22, 2016 at 9:25 PM, Charles Kozler <charles at fixflyer.com>
> wrote:
> > Here is a screenshot of my three nodes and their increased memory usage
> over
> > 30 days. Note that node #2 had 1 single VM that had 4GB of RAM assigned
> to
> > it. I had since shut it down and saw no memory reclamation occur.
> Further, I
> > flushed page caches and inodes and ran 'sync'. I tried everything but
> > nothing brought the memory usage down. vdsm was low too (couple hundred
> MB)
>
> Note that there is an old leak in vdsm, will be fixed in next 3.6 build:
> https://bugzilla.redhat.com/1269424
>
> > and there was no qemu-kvm process running so I'm at a loss
> >
> > http://imgur.com/a/aFPcK
> >
> > Please advise on what I can do to debug this. Note I have restarted node
> 2
> > (which is why you see the drop) to see if it raises in memory use over
> tim
> > even with no VM's running
>
> Not sure what is "memory" that you show in the graphs. Theoretically this
> may be
> normal memory usage, Linux using free memory for the buffer cache.
>
> Can you instead show the output of "free", during one day, maybe run once
> per hour?
>
> You may also like to install sysstat for collecting and monitoring
> resources usage.
>
> >
> > [compute[root at node2 log]$ rpm -qa | grep -i ovirt
> > libgovirt-0.3.2-1.el6.x86_64
> > ovirt-release35-006-1.noarch
> > ovirt-hosted-engine-ha-1.2.8-1.el6.noarch
> > ovirt-hosted-engine-setup-1.2.6.1-1.el6.noarch
> > ovirt-engine-sdk-python-3.5.6.0-1.el6.noarch
> > ovirt-host-deploy-1.3.2-1.el6.noarch
> >
> >
> > --
> >
> > Charles Kozler
> > Vice President, IT Operations
> >
> > FIX Flyer, LLC
> > 225 Broadway | Suite 1600 | New York, NY 10007
> > 1-888-349-3593
> > http://www.fixflyer.com
> >
> > NOTICE TO RECIPIENT: THIS E-MAIL IS MEANT ONLY FOR THE INTENDED
> RECIPIENT(S)
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>

-- 

*Charles Kozler*
*Vice President, IT Operations*

FIX Flyer, LLC
225 Broadway | Suite 1600 | New York, NY 10007
1-888-349-3593
http://www.fixflyer.com <http://fixflyer.com>

NOTICE TO RECIPIENT: THIS E-MAIL IS MEANT ONLY FOR THE INTENDED
RECIPIENT(S) OF THE TRANSMISSION, AND CONTAINS CONFIDENTIAL INFORMATION
WHICH IS PROPRIETARY TO FIX FLYER LLC.  ANY UNAUTHORIZED USE, COPYING,
DISTRIBUTION, OR DISSEMINATION IS STRICTLY PROHIBITED.  ALL RIGHTS TO THIS
INFORMATION IS RESERVED BY FIX FLYER LLC.  IF YOU ARE NOT THE INTENDED
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