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Thread: Upgraded server memory from 1g to 16g expecting zimbra to fly but crashed !!! HELP

  1. #1
    eliaslopez76 is offline Junior Member
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    Default Upgraded server memory from 1g to 16g expecting zimbra to fly but crashed !!! HELP

    Release 6.0.8_GA_2661.UBUNTU8 UBUNTU8 FOSS edition.
    I have a dell poweredge 2650 with 1 g of ram
    My ubuntu version has PAE enabled so I decided to upgrade to 16 gigs of ram to see zimbra fly.
    once I upgraded zmmailboxd couldn't start... due to some java heap problem,
    I tried some of the modifications on the forum but none seem to work...

    Now, I'm back with my amazing 1g of ram.
    and It's working.
    RAM is new, and it's good.

    any ideas ?
    some of the messages are:

    Invalid initial heap size: -Xms4764m
    The specified size exceeds the maximum representable size.
    Could not create the Java virtual machine.
    Error occurred during initialization of VM
    Could not reserve enough space for object heap

    Thanks in advance.
    Elias.
    Last edited by eliaslopez76; 10-21-2010 at 04:01 PM.

  2. #2
    LMStone's Avatar
    LMStone is offline Moderator
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    32-bit version yes?

    Try just putting in just 4GB RAM total and let us know if Zimbra starts up OK.

    Hope that helps,
    Mark

  3. #3
    eliaslopez76 is offline Junior Member
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    But that means I can not use my 16g in this server ? even if the OS has the PAE enabled ? how can I use those 16g ?

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    raj's Avatar
    raj
    raj is offline Moderator
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    how can I use those 16g ?
    1) your hardware needs to support 64 bit
    2) you need 64 Bit Linux OS
    and
    3) you need 64 Bit Zimbra for your OS

    once you have these 3 you can use 16GB or more...

    if your current hardware support 64bit and if you can afford little downtime then you can easily(after reading all wiki and fourms message of 32-to-64) move

    Raj
    i2k2 Networks
    Dedicated & Shared Zimbra Hosting Provider

  5. #5
    eliaslopez76 is offline Junior Member
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    Thanks Raj

    Now my server has capacity for 2 processors, and right now only one is installed... I purchased the other one and it will arrive tomorrow... do you think that I can run into trouble after installing this second processor ? (besides the fact that I already checked that is the right one, and from the bios/hardware perspective everything is going to be fine)

    regards
    Elias

  6. #6
    LMStone's Avatar
    LMStone is offline Moderator
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    I'm not seeing on Dell's site that the 2650 is a true 64-bit server in that it will run 64-bit operating systems with Intel VT extensions enabled.

    Sure, you could run a 32-bit PAE kernel to "see" the 16GB, but you'll still be running a 32-bit OS, and that means adjustments to Zimbra to enable Java to actually start etc.

    Hope that helps,
    Mark

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    eliaslopez76 is offline Junior Member
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    Dear Mark:

    Any specific guidance for implementing what you said ?

    "and that means adjustments to Zimbra to enable Java to actually start etc."

    cheers
    Elias.

  8. #8
    Rich Graves is offline Outstanding Member
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    32-bit Java cannot use more than about 1.5G memory. PAE won't help. You will be better off than with 1G, but you certainly won't be able to use the full 16G. Try -Xms1450m and scale up until it won't let you anymore.

    Dell PE2650 does not support 64-bit CPUs (we still have a couple running). You need at least a Dell PE1850/2850. Too late now, but you probably could have found one for not much more than the price of the additional RAM and CPU.

  9. #9
    eliaslopez76 is offline Junior Member
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    The hardware can handle 16g, what is the value that I have to put there ?

  10. #10
    eliaslopez76 is offline Junior Member
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    the server can handle 16g... and if I issue a top command I can see those 16g... but zmmailboxd won't start...

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