On 01/25/2018 11:04 PM, Dan Ragle wrote:
*sigh* trying again to correct formatting ... apologize for the
earlier mess.
Having a memory issue with Gluster 3.12.4 and not sure how to
troubleshoot. I don't *think* this is expected behavior.
This is on an updated CentOS 7 box. The setup is a simple two node
replicated layout where the two nodes act as both server and client.
The volume in question:
Volume Name: GlusterWWW
Type: Replicate
Volume ID: 8e9b0e79-f309-4d9b-a5bb-45d065faaaa3
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: vs1dlan.mydomain.com:/glusterfs_bricks/brick1/www
Brick2: vs2dlan.mydomain.com:/glusterfs_bricks/brick1/www
Options Reconfigured:
nfs.disable: on
cluster.favorite-child-policy: mtime
transport.address-family: inet
I had some other performance options in there, (increased cache-size,
md invalidation, etc) but stripped them out in an attempt to isolate
the issue. Still got the problem without them.
The volume currently contains over 1M files.
When mounting the volume, I get (among other things) a process as such:
/usr/sbin/glusterfs --volfile-server=localhost
--volfile-id=/GlusterWWW /var/www
This process begins with little memory, but then as files are accessed
in the volume the memory increases. I setup a script that simply reads
the files in the volume one at a time (no writes). It's been running
on and off about 12 hours now and the resident memory of the above
process is already at 7.5G and continues to grow slowly. If I stop the
test script the memory stops growing, but does not reduce. Restart the
test script and the memory begins slowly growing again.
This is obviously a contrived app environment. With my intended
application load it takes about a week or so for the memory to get
high enough to invoke the oom killer.
Can you try debugging with the statedump
(https://gluster.readthedocs.io/en/latest/Troubleshooting/statedump/#read-a-statedump)
of the fuse mount process and see what member is leaking? Take the
statedumps in succession, maybe once initially during the I/O and once
the memory gets high enough to hit the OOM mark.
Share the dumps here.
Regards,
Ravi
Is there potentially something misconfigured here?
I did see a reference to a memory leak in another thread in this list,
but that had to do with the setting of quotas, I don't have any quotas
set on my system.
Thanks,
Dan Ragle
daniel@xxxxxxxxxxxxxx
On 1/25/2018 11:04 AM, Dan Ragle wrote:
Having a memory issue with Gluster 3.12.4 and not sure how to
troubleshoot. I don't *think* this is expected behavior. This is on an
updated CentOS 7 box. The setup is a simple two node replicated layout
where the two nodes act as both server and client. The volume in
question: Volume Name: GlusterWWW Type: Replicate Volume ID:
8e9b0e79-f309-4d9b-a5bb-45d065faaaa3 Status: Started Snapshot Count: 0
Number of Bricks: 1 x 2 = 2 Transport-type: tcp Bricks: Brick1:
vs1dlan.mydomain.com:/glusterfs_bricks/brick1/www Brick2:
vs2dlan.mydomain.com:/glusterfs_bricks/brick1/www Options Reconfigured:
nfs.disable: on cluster.favorite-child-policy: mtime
transport.address-family: inet I had some other performance options in
there, (increased cache-size, md invalidation, etc) but stripped them
out in an attempt to isolate the issue. Still got the problem without
them. The volume currently contains over 1M files. When mounting the
volume, I get (among other things) a process as such:
/usr/sbin/glusterfs --volfile-server=localhost --volfile-id=/GlusterWWW
/var/www This process begins with little memory, but then as files are
accessed in the volume the memory increases. I setup a script that
simply reads the files in the volume one at a time (no writes). It's
been running on and off about 12 hours now and the resident memory of
the above process is already at 7.5G and continues to grow slowly. If I
stop the test script the memory stops growing, but does not reduce.
Restart the test script and the memory begins slowly growing again. This
is obviously a contrived app environment. With my intended application
load it takes about a week or so for the memory to get high enough to
invoke the oom killer. Is there potentially something misconfigured
here? Thanks, Dan Ragle daniel@xxxxxxxxxxxxxx
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