[Gluster-users] Gluster eating up a lot of ram

Nithya Balachandran nbalacha at redhat.com
Tue Jul 30 03:51:37 UTC 2019 

Hi Diego,

Please do the following:

gluster v get <volname> readdir-ahead

If this is enabled, please disable it and see if it helps. There was a leak
in the opendir codpath that was fixed in later released.

Regards,
Nithya


On Tue, 30 Jul 2019 at 09:04, Diego Remolina <dijuremo at gmail.com> wrote:

> Will this kill the actual process or simply trigger the dump? Which
> process should I kill? The brick process in the system or the fuse mount?
>
> Diego
>
> On Mon, Jul 29, 2019, 23:27 Nithya Balachandran <nbalacha at redhat.com>
> wrote:
>
>>
>>
>> On Tue, 30 Jul 2019 at 05:44, Diego Remolina <dijuremo at gmail.com> wrote:
>>
>>> Unfortunately statedump crashes on both machines, even freshly rebooted.
>>>
>>
>> Do you see any statedump files in /var/run/gluster?  This looks more like
>> the gluster cli crashed.
>>
>>>
>>> [root at ysmha01 ~]# gluster --print-statedumpdir
>>> /var/run/gluster
>>> [root at ysmha01 ~]# gluster v statedump export
>>> Segmentation fault (core dumped)
>>>
>>> [root at ysmha02 ~]# uptime
>>>  20:12:20 up 6 min,  1 user,  load average: 0.72, 0.52, 0.24
>>> [root at ysmha02 ~]# gluster --print-statedumpdir
>>> /var/run/gluster
>>> [root at ysmha02 ~]# gluster v statedump export
>>> Segmentation fault (core dumped)
>>>
>>> I rebooted today after 40 days. Gluster was eating up shy of 40GB of RAM
>>> out of 64.
>>>
>>> What would you recommend to be the next step?
>>>
>>> Diego
>>>
>>> On Mon, Mar 4, 2019 at 5:07 AM Poornima Gurusiddaiah <
>>> pgurusid at redhat.com> wrote:
>>>
>>>> Could you also provide the statedump of the gluster process consuming
>>>> 44G ram [1]. Please make sure the statedump is taken when the memory
>>>> consumption is very high, like 10s of GBs, otherwise we may not be able to
>>>> identify the issue. Also i see that the cache size is 10G is that something
>>>> you arrived at, after doing some tests? Its relatively higher than normal.
>>>>
>>>> [1]
>>>> https://docs.gluster.org/en/v3/Troubleshooting/statedump/#generate-a-statedump
>>>>
>>>> On Mon, Mar 4, 2019 at 12:23 AM Diego Remolina <dijuremo at gmail.com>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I will not be able to test gluster-6rc because this is a production
>>>>> environment and it takes several days for memory to grow a lot.
>>>>>
>>>>> The Samba server is hosting all types of files, small and large from
>>>>> small roaming profile type files to bigger files like adobe suite, autodesk
>>>>> Revit (file sizes in the hundreds of megabytes).
>>>>>
>>>>> As I stated before, this same issue was present back with 3.8.x which
>>>>> I was running before.
>>>>>
>>>>> The information you requested:
>>>>>
>>>>> [root at ysmha02 ~]# gluster v info export
>>>>>
>>>>> Volume Name: export
>>>>> Type: Replicate
>>>>> Volume ID: b4353b3f-6ef6-4813-819a-8e85e5a95cff
>>>>> Status: Started
>>>>> Snapshot Count: 0
>>>>> Number of Bricks: 1 x 2 = 2
>>>>> Transport-type: tcp
>>>>> Bricks:
>>>>> Brick1: 10.0.1.7:/bricks/hdds/brick
>>>>> Brick2: 10.0.1.6:/bricks/hdds/brick
>>>>> Options Reconfigured:
>>>>> performance.stat-prefetch: on
>>>>> performance.cache-min-file-size: 0
>>>>> network.inode-lru-limit: 65536
>>>>> performance.cache-invalidation: on
>>>>> features.cache-invalidation: on
>>>>> performance.md-cache-timeout: 600
>>>>> features.cache-invalidation-timeout: 600
>>>>> performance.cache-samba-metadata: on
>>>>> transport.address-family: inet
>>>>> server.allow-insecure: on
>>>>> performance.cache-size: 10GB
>>>>> cluster.server-quorum-type: server
>>>>> nfs.disable: on
>>>>> performance.io-thread-count: 64
>>>>> performance.io-cache: on
>>>>> cluster.lookup-optimize: on
>>>>> cluster.readdir-optimize: on
>>>>> server.event-threads: 5
>>>>> client.event-threads: 5
>>>>> performance.cache-max-file-size: 256MB
>>>>> diagnostics.client-log-level: INFO
>>>>> diagnostics.brick-log-level: INFO
>>>>> cluster.server-quorum-ratio: 51%
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free.
>>>>> www.avast.com
>>>>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link>
>>>>> <#m_8374238785685214358_m_-3340449949414300599_m_-7001269052163580460_m_-4519402017059013283_m_-1483290904248086332_m_-4429654867678350131_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>>>>>
>>>>> On Fri, Mar 1, 2019 at 11:07 PM Poornima Gurusiddaiah <
>>>>> pgurusid at redhat.com> wrote:
>>>>>
>>>>>> This high memory consumption is not normal. Looks like it's a memory
>>>>>> leak. Is it possible to try it on test setup with gluster-6rc? What is the
>>>>>> kind of workload that goes into fuse mount? Large files or small files? We
>>>>>> need the following information to debug further:
>>>>>> - Gluster volume info output
>>>>>> - Statedump of the Gluster fuse mount process consuming 44G ram.
>>>>>>
>>>>>> Regards,
>>>>>> Poornima
>>>>>>
>>>>>>
>>>>>> On Sat, Mar 2, 2019, 3:40 AM Diego Remolina <dijuremo at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> I am using glusterfs with two servers as a file server sharing files
>>>>>>> via samba and ctdb. I cannot use samba vfs gluster plugin, due to bug in
>>>>>>> current Centos version of samba. So I am mounting via fuse and exporting
>>>>>>> the volume to samba from the mount point.
>>>>>>>
>>>>>>> Upon initial boot, the server where samba is exporting files climbs
>>>>>>> up to ~10GB RAM within a couple hours of use. From then on, it is a
>>>>>>> constant slow memory increase. In the past with gluster 3.8.x we had to
>>>>>>> reboot the servers at around 30 days . With gluster 4.1.6 we are getting up
>>>>>>> to 48 days, but RAM use is at 48GB out of 64GB. Is this normal?
>>>>>>>
>>>>>>> The particular versions are below,
>>>>>>>
>>>>>>> [root at ysmha01 home]# uptime
>>>>>>> 16:59:39 up 48 days,  9:56,  1 user,  load average: 3.75, 3.17, 3.00
>>>>>>> [root at ysmha01 home]# rpm -qa | grep gluster
>>>>>>> centos-release-gluster41-1.0-3.el7.centos.noarch
>>>>>>> glusterfs-server-4.1.6-1.el7.x86_64
>>>>>>> glusterfs-api-4.1.6-1.el7.x86_64
>>>>>>> centos-release-gluster-legacy-4.0-2.el7.centos.noarch
>>>>>>> glusterfs-4.1.6-1.el7.x86_64
>>>>>>> glusterfs-client-xlators-4.1.6-1.el7.x86_64
>>>>>>> libvirt-daemon-driver-storage-gluster-3.9.0-14.el7_5.8.x86_64
>>>>>>> glusterfs-fuse-4.1.6-1.el7.x86_64
>>>>>>> glusterfs-libs-4.1.6-1.el7.x86_64
>>>>>>> glusterfs-rdma-4.1.6-1.el7.x86_64
>>>>>>> glusterfs-cli-4.1.6-1.el7.x86_64
>>>>>>> samba-vfs-glusterfs-4.8.3-4.el7.x86_64
>>>>>>> [root at ysmha01 home]# rpm -qa | grep samba
>>>>>>> samba-common-tools-4.8.3-4.el7.x86_64
>>>>>>> samba-client-libs-4.8.3-4.el7.x86_64
>>>>>>> samba-libs-4.8.3-4.el7.x86_64
>>>>>>> samba-4.8.3-4.el7.x86_64
>>>>>>> samba-common-libs-4.8.3-4.el7.x86_64
>>>>>>> samba-common-4.8.3-4.el7.noarch
>>>>>>> samba-vfs-glusterfs-4.8.3-4.el7.x86_64
>>>>>>> [root at ysmha01 home]# cat /etc/redhat-release
>>>>>>> CentOS Linux release 7.6.1810 (Core)
>>>>>>>
>>>>>>> RAM view using top
>>>>>>> Tasks: 398 total,   1 running, 397 sleeping,   0 stopped,   0 zombie
>>>>>>> %Cpu(s):  7.0 us,  9.3 sy,  1.7 ni, 71.6 id,  9.7 wa,  0.0 hi,  0.8
>>>>>>> si,  0.0 st
>>>>>>> KiB Mem : 65772000 total,  1851344 free, 60487404 used,  3433252
>>>>>>> buff/cache
>>>>>>> KiB Swap:        0 total,        0 free,        0 used.  3134316
>>>>>>> avail Mem
>>>>>>>
>>>>>>>   PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+
>>>>>>> COMMAND
>>>>>>>  9953 root      20   0 3727912 946496   3196 S 150.2  1.4  38626:27
>>>>>>> glusterfsd
>>>>>>>  9634 root      20   0   48.1g  47.2g   3184 S  96.3 75.3  29513:55
>>>>>>> glusterfs
>>>>>>> 14485 root      20   0 3404140  63780   2052 S  80.7  0.1   1590:13
>>>>>>> glusterfs
>>>>>>>
>>>>>>> [root at ysmha01 ~]# gluster v status export
>>>>>>> Status of volume: export
>>>>>>> Gluster process                             TCP Port  RDMA Port
>>>>>>> Online  Pid
>>>>>>>
>>>>>>> ------------------------------------------------------------------------------
>>>>>>> Brick 10.0.1.7:/bricks/hdds/brick           49157     0          Y
>>>>>>>      13986
>>>>>>> Brick 10.0.1.6:/bricks/hdds/brick           49153     0          Y
>>>>>>>      9953
>>>>>>> Self-heal Daemon on localhost               N/A       N/A        Y
>>>>>>>      14485
>>>>>>> Self-heal Daemon on 10.0.1.7                N/A       N/A        Y
>>>>>>>      21934
>>>>>>> Self-heal Daemon on 10.0.1.5                N/A       N/A        Y
>>>>>>>      4598
>>>>>>>
>>>>>>> Task Status of Volume export
>>>>>>>
>>>>>>> ------------------------------------------------------------------------------
>>>>>>> There are no active volume tasks
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free.
>>>>>>> www.avast.com
>>>>>>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link>
>>>>>>> <#m_8374238785685214358_m_-3340449949414300599_m_-7001269052163580460_m_-4519402017059013283_m_-1483290904248086332_m_-4429654867678350131_m_1092070095161815064_m_5816452762692804512_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>>>>>>> _______________________________________________
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>>>>>>
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>>
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