On Wed, Sep 07, 2011 at 11:48:11AM -0700, Kathy wrote:> Hi all --
>
> I recently temporarily deployed an upgraded Clearcase server (7.1.2.3)
> on 64 bit RHEL 5.6. With it I was using Redhat's release of Samba for
> that version of the OS -- 3.0.33. The system has 32 GB of memory
> and within 12 hours, it would be down into swap. Maximum active
> licenses used is 36 but a more typical load is 18-25 users having a
> Clearcase license at once. Clearcase clients are on Windows. This
> server is the whole shebang -- license server, view and vob server.
> All disks are local, no NAS. Most of the time our developers are
> using snapshot views but merge into the dynamic views.
>
> It looks to me like I have a memory leak, and IBM is blaming Samba,
Main question is: Do the smbd processes really consume all
that memory?
> seeing that I was using an unblessed version of the tool. Apparently
> 3.0.32 is blessed and 3.0.33 is not. Although I'm skeptical, I'm
> willing to entertain the idea that a 0.01 release change could be the
> problem, so I recently updated to 3.5.8, which apparently is blessed
> to work with 7.1.2.3. This system is now a test server so we can test
> it without impacting production use. We still need to do some load
> testing on it. The original server is on different hardware (still
> Dell, though), running 32 bit RHEL 5.2 and Clearcase 7.0.1.3, and
> Samba 3.0.28 (which also apparently isn't blessed by IBM but has never
> had any problems). I am using the samba smb.conf file for both
> releases/servers.
>
> For those of you who are familiar with how Clearcase and Samba work
> together, my questions are the following:
>
> 1. What is typical memory usage with Clearcase and Samba? Is it
> typical for it to cache all memory, eat into a little bit of swap (say
> 312k) and then sit there like that and work just fine? Or should I
> expect it to eat up initially a few gigs of memory and then stay
> relatively stable, recognizing that over time the running system will
> slowly eat up memory (but not all in 12 hours).
>
> 2. IBM has suggested making sure these conditions are met for mnode
> values on Windows clients and the MAX_OPEN_FILES is big enough on the
> Samba side: https://www-304.ibm.com/support/docview.wss?uid=swg21169548
>
> Basically saying that for a 64 bit Clearcase/Samba server, the max
> mnode values should be set to 800 and not the default 1800.
> Anyone with experience with this? We have not seen the particular
> errors mentioned in this article, but IBM support is telling me about
> it as a guideline. Also mentioned in the article is MAX_OPEN_FILES.
> My current value for that is 16,384. How do you know what is an
> optimal value for that for your system?
>
> Thanks for any input. I have asked IBM to describe typical memory
> usage but so far I'm not getting any solid answers.
>
> Kathy
> --
> To unsubscribe from this list go to the following URL and read the
> instructions: https://lists.samba.org/mailman/options/samba
--
SerNet GmbH, Bahnhofsallee 1b, 37081 G?ttingen
phone: +49-551-370000-0, fax: +49-551-370000-9
AG G?ttingen, HRB 2816, GF: Dr. Johannes Loxen