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

Il 22/Gen/2016 22:31, "Charles Kozler" <charles(a)fixflyer.com&gt; ha scritto: > > Hi Nir - > > do you have a release target date for 3.5.8? Any estimate would help. > There won't be any supported release after 3.5.6. Please update to 3.6.2 next week > If its not VDSM, what is it exactly? Sorry, I understood from the ticket it was something inside vdsm, was I mistaken? > > CentOS 6 is the servers. 6.7 to be exact > > I have done all forms of flushing that I can (page cache, inodes, dentry's, etc) and as well moved VM's around to other nodes and nothing changes the memory. How can I find the leak? Where is the leak? RES shows the following of which, the totals dont add up to 20GB > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 19044 qemu 20 0 8876m 4.0g 5680 S 3.6 12.9 1571:44 qemu-kvm > 26143 qemu 20 0 5094m 1.1g 5624 S 9.2 3.7 6012:12 qemu-kvm > 5837 root 0 -20 964m 624m 3664 S 0.0 2.0 85:22.09 glusterfs > 14328 root 0 -20 635m 169m 3384 S 0.0 0.5 43:15.23 glusterfs > 5134 vdsm 0 -20 4368m 111m 10m S 5.9 0.3 3710:50 vdsm > 4095 root 15 -5 727m 43m 10m S 0.0 0.1 0:02.00 supervdsmServer > > 4.0G + 1.1G + 624M + 169 + 111M + 43M = ~7GB > > This was top sorted by RES from highest to lowest > > At that point I wouldnt know where else to look except slab / kernel structures. Of which slab shows: > > [compute[root@node1 ~]$ cat /proc/meminfo | grep -i slab > Slab: 2549748 kB > > So roughly 2-3GB. Adding that to the other use of 7GB we have still about 10GB unaccounted for > > On Fri, Jan 22, 2016 at 4:24 PM, Nir Soffer <nsoffer(a)redhat.com&gt; wrote: >> >> On Fri, Jan 22, 2016 at 11:08 PM, Charles Kozler <charles(a)fixflyer.com&gt; wrote: >> > Hi Nir - >> > >> > Thanks for getting back to me. Will the patch to 3.6 be backported to 3.5? >> >> We plan to include them in 3.5.8. >> >> > 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 >> >> As you wrote, this issue is not related to 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@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@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@node2 ~]$ free >> > total used free shared buffers cached >> > Mem: 32765316 1815324 30949992 212 35784 717320 >> > -/+ buffers/cache: 1062220 31703096 >> > Swap: 19247100 0 19247100 >> >> Is this rhel/centos 6? >> >> > [compute[root@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 >> >> I guess you should start looking at the processes running on these nodes. >> >> Maybe try to collect memory usage per process using ps? >> >> > >> > On Fri, Jan 22, 2016 at 3:59 PM, Nir Soffer <nsoffer(a)redhat.com&gt; wrote: >> >> >> >> On Fri, Jan 22, 2016 at 9:25 PM, Charles Kozler < charles(a)fixflyer.com&gt; >> >> 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@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) >> >> > OF THE TRANSMISSION, AND CONTAINS CONFIDENTIAL INFORMATION WHICH IS >> >> > PROPRIETARY TO FIX FLYER LLC. 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