[Gluster-devel] High memory cost of glusterfsd when enable quota

[Sanoj Unnikrishnan]

Hi kinglong,
I did not hit the same issue on my setup..  4 cores + 16 GB ram.
I am planning to run some test by limiting no of cores and memory available
with cgroups..
maybe there is an issue when the system has lower end configurations.
Regards,
Sanoj

On Thu, Jun 29, 2017 at 6:21 PM, Sanoj Unnikrishnan <sunnikri at redhat.com>
wrote:

> Hi kinglong,
>
> I will do this test and get back to u tomorrow.
> Regards,
> Sanoj
>
> On Wed, Jun 28, 2017 at 6:23 PM, Kinglong Mee <kinglongmee at gmail.com>
> wrote:
>
>> I use glusterfs quota on Centos7 with glusterfs-3.10.2-1.el7.x86_64,
>> system memory is 2GB.
>> My test environment is two glustefs nodes, with one 10GB disk (ext4) each.
>>
>> When enable quota with many files in the glusterfs, the glusterfsd in one
>> node
>> costs high memory towards 40%+ of 2GB, or both nodes costs high memory
>> sometimes.
>>
>> Node one,
>>    PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+
>> COMMAND
>>  30017 root      20   0 1487412 115528   4648 S   0.0  6.2   3:11.81
>> glusterfsd
>>
>> The other node,
>>    PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+
>> COMMAND
>> 102510 root      20   0 1439044 700264   4668 S  0.0 37.5   2:31.37
>> glusterfsd
>>
>> The reproduce is,
>> # gluster volume start fsname
>> # mount -t glusterfs nodename:fsname /mnt/test/
>> # cp -rf linux-source /mnt/test/           <---- it's important adds many
>> files before enable quota.
>> # gluster volume quota fsname enable
>>
>> Sometime, needs disable quota and re-enable again, the high memory cost
>> will appear.
>>
>> But, I can't find the high memory cost when debugging by valgrind,
>> the memory cost will increase slowly to 10%.
>>
>> Any comments are welcome.
>>
>> thanks,
>> Kinglong Mee
>>
>>
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>> Gluster-devel at gluster.org
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>>
>
>
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