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Thread: High Swap File Usage, Lots of Memory Free

  1. #1
    krknopp is offline Member
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    Default High Swap File Usage, Lots of Memory Free

    I have a Zimbra server that I migrated to ESX server. When I did the migration I messed up and only alloted 256MB to the VM at the time of migration. since then I have upped the RAM allotment to 1GB. I only have 28 mailboxes on the server.

    The problem I'm having is high swap file usage with lots of memory still available. Normally, I have about 490MB free in main memory and there is a little over 500MB of swap used. When I restart zimbra the swap goes down to around 10MB for a few minutes and then its back up to 500MB used.

    I found that the MySQL server was only set to use about 10% of memory and so I readjusted it to use 40%.

    I'm wondering what else might need to be adjusted to allow for the higher memory actually available or if there's something else I can do to allow/force Zimbra to use more real memory.

    Kerry

  2. #2
    uxbod's Avatar
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    Could you post
    Code:
    free
    cat /proc/meminfo
    Also, http://www.zimbra.com/forums/announc...r-profile.html please

  3. #3
    krknopp is offline Member
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    free:

    total used free shared buffers cached
    Mem: 1034956 994004 40952 0 1872 40188
    -/+ buffers/cache: 951944 83012
    Swap: 1048568 569544 479024


    cat /proc/meminfo

    MemTotal: 1034956 kB
    MemFree: 576808 kB
    Buffers: 2448 kB
    Cached: 42408 kB
    SwapCached: 158528 kB
    Active: 354716 kB
    Inactive: 18696 kB
    HighTotal: 131008 kB
    HighFree: 23644 kB
    LowTotal: 903948 kB
    LowFree: 553164 kB
    SwapTotal: 1048568 kB
    SwapFree: 490864 kB
    Dirty: 532 kB
    Writeback: 0 kB
    AnonPages: 301144 kB
    Mapped: 16856 kB
    Slab: 8088 kB
    SReclaimable: 2216 kB
    SUnreclaim: 5872 kB
    PageTables: 3536 kB
    NFS_Unstable: 0 kB
    Bounce: 0 kB
    CommitLimit: 1566044 kB
    Committed_AS: 2083036 kB
    VmallocTotal: 114680 kB
    VmallocUsed: 2548 kB
    VmallocChunk: 111552 kB
    HugePages_Total: 0
    HugePages_Free: 0
    HugePages_Rsvd: 0
    Hugepagesize: 4096 kB

  4. #4
    jholder's Avatar
    jholder is offline Former Zimbran
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    swap file usage is usually determined by the OS. Java simply makes the request for memory.

    Have you tried checking your dmesg for any errors?

  5. #5
    uxbod's Avatar
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    Pre-reqs for V5 is 2GB RAM minimum

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    krknopp is offline Member
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    I tried increasing the RAM today to 1.5GB. I know its still below recommended, but with my low usage I thought I'd give it a try. I'll probably have to buy more, but trying to hold out a little longer.

    Thanks for the replies.

  7. #7
    Klug's Avatar
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    Actually, I have general questions about "adding RAM" (for Zimbroïds).

    AFAIK, ZCS install script creates the start files for the differents modules and sets some "max memory" (heap size ?) information in this files.

    What is the correct way to let ZCS know you've given it more RAM (or changed server to a more powerfull one) ?

    Does the install.sh script chooses the best values each times it is launched (so launching it is enough) ? Should we do something "by hand" ?

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