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Thread: default_destination_concurrency_limit and zimbraLmtpNumThreads

  1. #1
    zhangyq is offline Intermediate Member
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    Default default_destination_concurrency_limit and zimbraLmtpNumThreads

    I want to modify the value of these two attributes :default_destination_concurrency_limit and zimbraLmtpNumThreads
    Somebody who knows the maxmum of them ? And once increased them to the maxmum , what will happen to the server . My aim is to speed up the servers. because our users compliant that it cost quite a long time to receive the new mails. somebody know ? thanks!

  2. #2
    uxbod's Avatar
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    Is that definitely the issue why emails are being processed slowly ? Are you that it is now within Amavisd where the problem is eg. slow AV and AS checks. Is this a default installation, or have you changed the SA rules or RBLs ?

    I would also help if we knew which version of ZCS you were running ?
    Code:
    su - zimbra
    zmcontrol -v

  3. #3
    zhangyq is offline Intermediate Member
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    Default zcs506 i used

    I am not very sure whether or not is the problem of these two attributes .but i still want to have a try. I now want to know the maxmum of them .and the risk of what i am doing .thanks!

  4. #4
    uxbod's Avatar
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    Have a read of Performance Tuning Guidelines for Large Deployments - Zimbra :: Wiki especially the section on LMTP.

  5. #5
    zhangyq is offline Intermediate Member
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    Default I still not found the num.

    I read the file ,but i still not found the maxmum. do you know ?

  6. #6
    uxbod's Avatar
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    Maximum would be dependant on TCP kernel parameters and the spec of you server as each connection would also use CPU cycles and memory. Personally I would be looking to other areas of your system than these two values. What does top and free show ?

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