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  • 1.  Swap Partition - Best Practice

    Posted Jul 27, 2009 07:38 AM

    Hello all,

    What is considered as a best practice for creating the swap partition?

    Since ESX 4 is based on Red Hat Enterprise Linux Server release 5.1,

    I have searched their knowledge base and found the following article:

    Q. If I add several hundred GB of RAM to a system do I really need several

    hundred GB of swap space ? (kbase.redhat.com/faq/docs/DOC-15252)

    A. Brief answer:

    • Systems with 4GB of ram or less require a minimum of 2GB of swap space

    • Systems with 4GB to 16GB of ram require a minimum of 4GB of swap space

    • Systems with 16GB to 64GB of ram require a minimum of 8GB of swap space

    • Systems with 64GB to 256GB of ram require a minimum of 16GB of swap space

    Thanks in advance,

    Ronen.



  • 2.  RE: Swap Partition - Best Practice

    Posted Jul 27, 2009 07:44 AM

    i believe ESX 4.0 is RHEL 5.3 based.

    By default if you see ESX 4.0 partitioning, swap partition is 1GB. for linux, swap space = double the size of RAM. if RAM size is >= 4GB swap can be 4GB itself.

    I think the same is applicable for ESX 4.0 . but its better to check in the VMware docs.



  • 3.  RE: Swap Partition - Best Practice
    Best Answer

    Posted Jul 27, 2009 08:33 AM

    1.6GB as the Service Console is limited to 800MB of memory.

    Duncan

    VMware Communities User Moderator | VCP | VCDX

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  • 4.  RE: Swap Partition - Best Practice

    Posted Jul 27, 2009 08:37 AM

    How can I find the current Service Console memory usage?



  • 5.  RE: Swap Partition - Best Practice

    Posted Jul 27, 2009 08:47 AM

    /proc/meminfo will give you the COS memory usage info



  • 6.  RE: Swap Partition - Best Practice

    Posted Jul 27, 2009 08:52 AM

    Which one is the service console?

    cat /proc/meminfo

    MemTotal: 500264 kB

    MemFree: 80824 kB

    Buffers: 105516 kB

    Cached: 236284 kB

    SwapCached: 0 kB

    Active: 206700 kB

    Inactive: 181564 kB

    HighTotal: 0 kB

    HighFree: 0 kB

    LowTotal: 500264 kB

    LowFree: 80824 kB

    SwapTotal: 2048248 kB

    SwapFree: 2048248 kB

    Dirty: 372 kB

    Writeback: 0 kB

    AnonPages: 46492 kB

    Mapped: 43176 kB

    Slab: 23936 kB

    PageTables: 2232 kB

    NFS_Unstable: 0 kB

    Bounce: 0 kB

    CommitLimit: 2298380 kB

    Committed_AS: 306784 kB

    VmallocTotal: 34359738367 kB

    VmallocUsed: 25700 kB

    VmallocChunk: 34359704455 kB

    HugePages_Total: 0

    HugePages_Free: 0

    HugePages_Rsvd: 0

    Hugepagesize: 2048 kB

    MachineMem: 16776447 kB



  • 7.  RE: Swap Partition - Best Practice

    Posted Jul 27, 2009 09:26 AM

    its Memtotal - Memfree.

    you can see the total physical memory from MachineMem field



  • 8.  RE: Swap Partition - Best Practice

    Posted Jul 27, 2009 09:29 AM

    Thank you two