[Ocfs2-users] OCFS2 has a likely memory leak. Bug 864

[Alexei_Roudnev]

Run for 1 hour (even more), created 600,000 files (and removed then), from 2
hosts.

No memory leak problem, but # of slab-512 (not 256) growth - 77,000 used,
600,000 objects active in slab-32 and slab-512.

So there is object leak in the OCFSv2 / SLES9 Sp3, less aggressive than
described one. Anyway, creating 100,000,000 files (and deleting them) will
kill the system for sure (as I predicted before - OCFSv2 can be used, if you
bhhave not intensive file creation or modification).


 Active / Total Objects (% used)    : 1586075 / 1736513 (91.3%)
 Active / Total Slabs (% used)      : 108815 / 108842 (100.0%)
 Active / Total Caches (% used)     : 96 / 133 (72.2%)
 Active / Total Size (% used)       : 398467.35K / 428911.02K (92.9%)
 Minimum / Average / Maximum Object : 0.02K / 0.25K / 128.00K

  OBJS ACTIVE  USE OBJ SIZE  SLABS OBJ/SLAB CACHE SIZE NAME
628096 628044  99%    0.03K   5608      112     22432K size-32
627352 627352 100%    0.50K  78419        8    313676K size-512
207600 151528  72%    0.09K   5190       40     20760K buffer_head
 97320  83204  85%    0.12K   3244       30     12976K size-128
 63450  14540  22%    0.25K   4230       15     16920K dentry_cache
 31584  16754  53%    0.52K   4512        7     18048K radix_tree_node
 19228  18049  93%    0.17K    874       22      3496K vm_area_struct
 12384   9922  80%    0.02K     86      144       344K anon_vma
  6210   5979  96%    0.25K    414       15      1656K filp
  5730   2669  46%    0.25K    382       15      1528K size-256
  3744   2782  74%    0.88K    936        4      3744K ext3_inode_cache
  3390   3346  98%    0.62K    565        6      2260K inode_cache
  3132   1855  59%    0.06K     54       58       216K size-64
  2800    798  28%    0.02K     14      200        56K biovec-1
  2605   2438  93%    0.75K    521        5      2084K proc_inode_cache
  2378   1794  75%    0.06K     41       58       164K ocfs2_em_ent
  1590    866  54%    0.12K     53       30       212K bio




----- Original Message ----- 
From: "Sunil Mushran" <Sunil.Mushran at oracle.com>
To: "Alexei_Roudnev" <Alexei_Roudnev at exigengroup.com>
Cc: "John Lange" <john.lange at open-it.ca>; "ocfs2-users"
<ocfs2-users at oss.oracle.com>
Sent: Tuesday, March 27, 2007 12:36 PM
Subject: Re: [Ocfs2-users] OCFS2 has a likely memory leak. Bug 864


> You'll run into the size-256 slab explosion on sles9 sp3.
> That issue was addressed in 1.2.4.  sp3 ships 1.2.3.
>
> Alexei_Roudnev wrote:
> > OCFSv2 @ SLES9 Sp3 build 283 is relatively stable. I am running your
test on
> > 2 hosts now (create files from 2 hosts, and delete them with some delay
from
> > host1 by rm -rf; without any sleep's; let's see how it works).
> >
> > I'll post results here.
> >
> > (I have impression, that SLES10 OCFSv2 is not stable at all - many
numerous
> > complains let me think, that it is not tested well, when
> > they integrated OCFS into SLES10).
> >
>