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Thread: ZCS Taking up 3Gb+ RAM post install

  1. #1
    ked
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    Default ZCS Taking up 3Gb+ RAM post install

    Hi all,

    I have just completed my first install of ZCS Community on a clean Centos 5.2 VPS.

    The install went very smoothly, although I was quite suprised to find that the initial install is taking up in excess of 3Gb RAM:

    PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
    3456 zimbra 18 0 2027m 259m 41m S 0 6.6 0:16.22 java
    1 root 15 0 10328 732 616 S 0 0.0 0:00.16 init
    1364 zimbra 15 0 1147m 145m 3952 S 0 3.7 0:00.96 mysqld
    3154 root 18 0 84020 3276 2564 R 0 0.1 0:00.08 sshd
    3269 root 15 0 12044 1616 1268 S 0 0.0 0:00.02 bash
    3455 root 22 0 3772 400 308 S 0 0.0 0:00.00 zmmailboxdmgr
    3541 zimbra 18 0 177m 75m 2176 S 0 1.9 0:00.99 amavisd
    3757 zimbra 18 0 177m 74m 872 S 0 1.9 0:00.00 amavisd
    3758 zimbra 18 0 177m 74m 848 S 0 1.9 0:00.00 amavisd
    3759 zimbra 19 0 177m 74m 848 S 0 1.9 0:00.00 amavisd
    3760 zimbra 20 0 177m 74m 848 S 0 1.9 0:00.00 amavisd
    3761 zimbra 21 0 177m 74m 848 S 0 1.9 0:00.00 amavisd
    3762 zimbra 21 0 177m 74m 848 S 0 1.9 0:00.00 amavisd
    3763 zimbra 21 0 177m 74m 848 S 0 1.9 0:00.00 amavisd
    3764 zimbra 25 0 177m 74m 848 S 0 1.9 0:00.00 amavisd
    3765 zimbra 24 0 177m 74m 848 S 0 1.9 0:00.00 amavisd
    3766 zimbra 24 0 177m 74m 848 S 0 1.9 0:00.00 amavisd
    3768 zimbra 16 0 26072 1464 1044 S 0 0.0 0:00.07 freshclam
    3781 zimbra 18 0 120m 100m 460 S 0 2.6 0:00.00 clamd
    3829 zimbra 18 0 55252 4532 1964 S 0 0.1 0:00.08 httpd
    3869 zimbra 18 0 55252 3028 448 S 0 0.1 0:00.00 httpd
    3870 zimbra 18 0 55252 3028 448 S 0 0.1 0:00.00 httpd
    3871 zimbra 18 0 55252 3028 448 S 0 0.1 0:00.00 httpd
    3872 zimbra 18 0 55252 3028 448 S 0 0.1 0:00.00 httpd
    3873 zimbra 22 0 55252 3028 448 S 0 0.1 0:00.00 httpd
    5354 root 15 0 42384 2104 1552 S 0 0.1 0:00.00 master
    5358 postfix 15 0 42504 2084 1560 S 0 0.1 0:00.00 qmgr
    5359 postfix 15 0 42456 2036 1524 S 0 0.1 0:00.00 pickup
    5362 zimbra 21 0 51352 924 444 S 0 0.0 0:00.00 saslauthd
    5363 zimbra 18 0 51352 656 176 S 0 0.0 0:00.00 saslauthd
    5364 zimbra 18 0 51352 644 164 S 0 0.0 0:00.00 saslauthd
    5365 zimbra 18 0 51352 644 164 S 0 0.0 0:00.00 saslauthd
    5366 zimbra 21 0 51352 644 164 S 0 0.0 0:00.00 saslauthd
    5518 zimbra 19 0 29764 5000 1712 S 0 0.1 0:00.21 zmstat-proc
    5520 zimbra 15 0 29504 4728 1712 S 0 0.1 0:00.07 zmstat-cpu
    5522 zimbra 17 0 29504 4732 1708 S 0 0.1 0:00.06 zmstat-vm

    Java & MySQL seem to be the main culprits, taking 2Gb & 1Gb respectively. Before install, I checked the requirements for an evaluation install of Zimbra:

    Evaluation and Testing
    •Intel/AMD 32-bit or 64-bit CPU 1.5 GHz
    •1 GB RAM
    •5 GB free disk space for software and logs
    •Temp file space for installs and upgrades*
    •Additional disk space for mail storage

    These specs would fit in to our dev environment far more comfortably.

    Fortunately I have access to the VPS hardware node and have been able to free up some extra resource for the Zimbra install, but I am having to shutdown other dev VPS's in order for Zimbra to run. It's making it quite awkward to test and evaluate!

    This install will have no more than a couple of accounts on it.

    Can anyone suggest how to tune down the current resource usage to fit the evaluation specs?

    Regards,

    Al

  2. #2
    uxbod's Avatar
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    Welcome to the forums

    First of all you can tune back home much memory Java is using
    Code:
    su - zimbra
    zmlocalconfig | grep mailboxd_java_heap_memory_percent (By default 30% of system memory is reserved; so set using the following
    zmlocalconfig -e mailboxd_java_heap_memory_percent=20
    zmlocalconfig -e mysql_memory_percent=20
    zmcontrol stop ; zmcontrol start
    You can also have a read through Making Zimbra run on minimal RAM - Zimbra :: Wiki.

  3. #3
    ked
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    Hi Uxbod,

    Thanks for the fast reply and the welcome!

    I'll give both of those a try.

    Al

    Ps: Interesting to see you're running Centos too. I understand that it is unsupported but in reality, is there quite a large installation base?

  4. #4
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    Yes quite a lot of people are running CentOS; and you can follow the interest here :- Bug 23487 – Official Support for ZCS Network Edition on CentOS

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