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Thread: Concerns about Zimbra Performance

  1. #11
    phoenix is online now Zimbra Consultant & Moderator
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    Quote Originally Posted by crp
    i would sum up the situation that the Zimbra is working but not functioning.

    The server is running FC5 on a dual xeon 2.4 system with about 2G of RAM.

    Peformance issue with just the email client is right off 2 fold:
    1: it is so slow even with under a dozen messages
    2: on large emails , for example the logwatch report, Zimbra chokes on displaying the whole message. It eventually just displays a black section.
    Did you disable SElinux on this machine? I do mean disable and not permissive mode.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  2. #12
    soxfan is offline Moderator
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    OK, two areas to reply to.

    Did you disable SElinux on this machine? I do mean disable and not permissive mode.
    I have SElinux enabled on my machine. I have no problem disabling it, just curious as to why.

    If you really can't get more drives and *must* stay at 420GB then you are stuck but as Bill warned RAID 5 is the worst config for our index and DB files. Lots of small writes and heavy random read traffic.
    Well, the server that I have for this project has six hard drive bays; five of which are currently taken. I *might* be able to get a sixth matching drive, and I *might* be willing to give up the hot spare. We are certainly not going to replace all the existing drives with bigger drives at this time. We were considering using an EMC array, with more space, but that got shot down, at least for now, for budgetary reasons. As far as the 420 GB requirement, I based that off 400 users averaging a 1 GB per person. I think that is pretty fair. When we migrate our users over we may allow them to copy their existing email, currently stored on local .pst files, over. So the space could be used up pretty quickly.
    It sounds like I definitely need to dump the RAID 5. Assuming I can't get the additional drive would it be better to just configure the array as JBOD, and use LVM within Linux, or something like that?

  3. #13
    kirme3 is offline Trained Alumni
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    Default Do not use RAID 5

    Just letting you know, RAID 5 and Zimbra just don't mix well. Trust me, I went live with Zimbra on RAID 5 and wish I hadn't. We ended up switching everything to 0+1. Since then, performance is much better. Mail has not gotten behind in queue's and we have ~75,000 - 100,000 messages delivered inbound each day(that does not include internal mail processing). We also have 3 MTA's and 5 mailbox stores for our 23,000 users.

  4. #14
    phoenix is online now Zimbra Consultant & Moderator
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    SElinux can cause problems with Zimbra and it's recommended to disable it.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  5. #15
    crp
    crp is offline Intermediate Member
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    Default response to responses re: not functioning

    SELINUX=disabled on the server.

    One client pc is old (700Mhz, NTWS4), so I am not too surprised about slow and poor performance.

    The other one is running W2K SP4 on Celeron 2.2.6G with 256M RAM and 720M swap , using Firefox 2.

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