[Gluster-users] high memory usage of mount
Ryan Clough
ryan.clough at dsic.com
Mon Aug 4 19:07:57 UTC 2014
Hi,
I too was experiencing this issue on my bricks. I am using version 3.5.2
and after setting io-cache and quick-read to "off", as Poornima suggested,
I am no longer seeing glusterfs gobbling memory. I noticed it first when I
enabled quotas and during the quota-crawl glusterfs process would be OOM
killed by the kernel. Before, my bricks would consume all available memory
until swap was exhausted and the kernel OOMs the glusterfs process. There
is a rebalance running right now and glusterfs is behaving. Here is some
output of my current config. Let me know if I can provide anything else to
help.
[root at tgluster01 ~]# gluster volume status all detail
Status of volume: tgluster_volume
------------------------------------------------------------------------------
Brick : Brick tgluster01:/gluster_data
Port : 49153
Online : Y
Pid : 2407
File System : xfs
Device : /dev/mapper/vg_data-lv_data
Mount Options :
rw,noatime,nodiratime,logbufs=8,logbsize=256k,inode64,nobarrier
Inode Size : 512
Disk Space Free : 3.5TB
Total Disk Space : 27.3TB
Inode Count : 2929685696
Free Inodes : 2863589912
------------------------------------------------------------------------------
Brick : Brick tgluster02:/gluster_data
Port : 49152
Online : Y
Pid : 2402
File System : xfs
Device : /dev/mapper/vg_data-lv_data
Mount Options :
rw,noatime,nodiratime,logbufs=8,logbsize=256k,inode64,nobarrier
Inode Size : 512
Disk Space Free : 5.4TB
Total Disk Space : 27.3TB
Inode Count : 2929685696
Free Inodes : 2864874648
[root at tgluster01 ~]# gluster volume status
Status of volume: tgluster_volume
Gluster process Port Online Pid
------------------------------------------------------------------------------
Brick tgluster01:/gluster_data 49153 Y 2407
Brick tgluster02:/gluster_data 49152 Y 2402
Quota Daemon on localhost N/A Y 2415
Quota Daemon on tgluster02 N/A Y 2565
Task Status of Volume tgluster_volume
------------------------------------------------------------------------------
Task : Rebalance
ID : 31fd1edb-dd6d-4c25-b4b5-1ce7bc0670f3
Status : in progress
[root at tgluster01 ~]# gluster volume info
Volume Name: tgluster_volume
Type: Distribute
Volume ID: 796774f8-f9ec-476c-9d08-0f5f937d5ad9
Status: Started
Number of Bricks: 2
Transport-type: tcp
Bricks:
Brick1: tgluster01:/gluster_data
Brick2: tgluster02:/gluster_data
Options Reconfigured:
features.quota-deem-statfs: on
performance.client-io-threads: on
performance.md-cache-timeout: 1
performance.cache-max-file-size: 10MB
network.ping-timeout: 60
performance.write-behind-window-size: 4MB
performance.read-ahead: on
performance.cache-refresh-timeout: 1
performance.cache-size: 10GB
performance.quick-read: off
nfs.disable: on
features.quota: on
performance.io-thread-count: 24
cluster.eager-lock: on
server.statedump-path: /var/log/glusterfs/
performance.flush-behind: on
performance.write-behind: on
performance.stat-prefetch: on
performance.io-cache: off
[root at tgluster01 ~]# gluster volume status all mem
Memory status for volume : tgluster_volume
----------------------------------------------
Brick : tgluster01:/gluster_data
Mallinfo
--------
Arena : 25788416
Ordblks : 7222
Smblks : 1
Hblks : 12
Hblkhd : 16060416
Usmblks : 0
Fsmblks : 80
Uordblks : 25037744
Fordblks : 750672
Keepcost : 132816
Mempool Stats
-------------
Name HotCount ColdCount PaddedSizeof AllocCount
MaxAlloc Misses Max-StdAlloc
---- -------- --------- ------------ ----------
-------- -------- ------------
tgluster_volume-server:fd_t 11 1013 108
194246 22 0 0
tgluster_volume-server:dentry_t 16384 0 84
1280505 16384 481095 32968
tgluster_volume-server:inode_t 16383 1 156
13974240 16384 7625153 39688
tgluster_volume-changelog:changelog_local_t 0 64
108 0 0 0 0
tgluster_volume-locks:pl_local_t 0 32 148
3922857 4 0 0
tgluster_volume-marker:marker_local_t 0 128 332
6163938 8 0 0
tgluster_volume-quota:struct saved_frame 0 16
124 65000 6 0 0
tgluster_volume-quota:struct rpc_req 0 16 588
65000 6 0 0
tgluster_volume-quota:quota_local_t 0 64 404
4476051 8 0 0
tgluster_volume-server:rpcsvc_request_t 0 512 2828
6694494 8 0 0
glusterfs:struct saved_frame 0 8 124
2 2 0 0
glusterfs:struct rpc_req 0 8 588
2 2 0 0
glusterfs:rpcsvc_request_t 1 7 2828
2 1 0 0
glusterfs:data_t 164 16219 52
60680465 2012 0 0
glusterfs:data_pair_t 159 16224 68
34718980 1348 0 0
glusterfs:dict_t 15 4081 140
24689263 714 0 0
glusterfs:call_stub_t 0 1024 3756
8263013 9 0 0
glusterfs:call_stack_t 1 1023 1836
6675669 8 0 0
glusterfs:call_frame_t 0 4096 172
55532603 251 0 0
----------------------------------------------
Brick : tgluster02:/gluster_data
Mallinfo
--------
Arena : 18714624
Ordblks : 4211
Smblks : 1
Hblks : 12
Hblkhd : 16060416
Usmblks : 0
Fsmblks : 80
Uordblks : 18250608
Fordblks : 464016
Keepcost : 131360
Mempool Stats
-------------
Name HotCount ColdCount PaddedSizeof AllocCount
MaxAlloc Misses Max-StdAlloc
---- -------- --------- ------------ ----------
-------- -------- ------------
tgluster_volume-server:fd_t 11 1013 108
155373 22 0 0
tgluster_volume-server:dentry_t 16383 1 84
1297732 16384 396012 21124
tgluster_volume-server:inode_t 16384 0 156
13896002 16384 7434842 24494
tgluster_volume-changelog:changelog_local_t 0 64
108 0 0 0 0
tgluster_volume-locks:pl_local_t 2 30 148
5578625 17 0 0
tgluster_volume-marker:marker_local_t 3 125 332
6834019 68 0 0
tgluster_volume-quota:struct saved_frame 0 16
124 64922 10 0 0
tgluster_volume-quota:struct rpc_req 0 16 588
65000 10 0 0
tgluster_volume-quota:quota_local_t 3 61 404
4216852 64 0 0
tgluster_volume-server:rpcsvc_request_t 3 509 2828
6406870 64 0 0
glusterfs:struct saved_frame 0 8 124
2 2 0 0
glusterfs:struct rpc_req 0 8 588
2 2 0 0
glusterfs:rpcsvc_request_t 1 7 2828
2 1 0 0
glusterfs:data_t 185 16198 52
80402618 1427 0 0
glusterfs:data_pair_t 177 16206 68
40014499 737 0 0
glusterfs:dict_t 18 4078 140
35345779 729 0 0
glusterfs:call_stub_t 3 1021 3756
21374090 68 0 0
glusterfs:call_stack_t 4 1020 1836
6824400 68 0 0
glusterfs:call_frame_t 20 4076 172
97255627 388 0 0
----------------------------------------------
Ryan Clough
Information Systems
Decision Sciences International Corporation
<http://www.decisionsciencescorp.com/>
<http://www.decisionsciencescorp.com/>
On Sun, Aug 3, 2014 at 11:36 PM, Poornima Gurusiddaiah <pgurusid at redhat.com>
wrote:
> Hi,
>
> From the statedump it is evident that the iobufs are leaking.
> Also the hot count of the pool-name=w-vol-io-cache:rbthash_entry_t is
> 10053, implies io-cache xlator could be the cause of the leak.
> From the logs, it looks like, quick-read performance xlator is calling
> iobuf_free with NULL pointers, implies quick-read could be leaking iobufs
> as well.
>
> As a temperory solution, could you disable io-cache and/or quick-read and
> see if the leak still persists?
>
> $gluster volume set io-cache off
> $gluster volume set quick-read off
>
> This may reduce the performance to certain extent.
>
> For further debugging, could you provide the core dump or steps to
> reproduce if avaiable?
>
> Regards,
> Poornima
>
> ----- Original Message -----
> From: "Tamas Papp" <tompos at martos.bme.hu>
> To: "Poornima Gurusiddaiah" <pgurusid at redhat.com>
> Cc: Gluster-users at gluster.org
> Sent: Sunday, August 3, 2014 10:33:17 PM
> Subject: Re: [Gluster-users] high memory usage of mount
>
>
> On 07/31/2014 09:17 AM, Tamas Papp wrote:
> >
> > On 07/31/2014 09:02 AM, Poornima Gurusiddaiah wrote:
> >> Hi,
> >
> > hi,
> >
> >> Can you provide the statedump of the process, it can be obtained as
> >> follows:
> >> $ gluster --print-statedumpdir #create this directory if it doesn't
> >> exist.
> >> $ kill -USR1 <pid-of-glusterfs-process> #generates state dump.
> >
> > http://rtfm.co.hu/glusterdump.2464.dump.1406790562.zip
> >
> >> Also, xporting Gluster via Samba-VFS-plugin method is preferred over
> >> Fuse mount export. For more details refer to:
> >>
> http://lalatendumohanty.wordpress.com/2014/02/11/using-glusterfs-with-samba-and-samba-vfs-plugin-for-glusterfs-on-fedora-20/
> >>
> >
> > When I tried it about half year ago it didn't work properly. Clients
> > lost mounts, access errors etc.
> >
> > But I will give it a try, though it's not included in ubuntu's samba
> > AFAIK.
> >
> >
> > Thank you,
> > tamas
> >
> > ps. I forget to mention, I can see this issue only one node. The rest
> > of nodes are fine.
>
> hi Poornima,
>
> Do you have idea, what's going on here?
>
> Thanks,
> tamas
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> Gluster-users at gluster.org
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>
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