memory issue - Redhat

This is a discussion on memory issue - Redhat ; I joined a company and I noticed Oracle 10g installed on linux server with 8 GB of ram. I can't seem to understand why all the memory is taken. When I run free all the memory is used up: total ...

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Thread: memory issue

  1. memory issue

    I joined a company and I noticed Oracle 10g installed on linux server
    with 8 GB of ram.
    I can't seem to understand why all the memory is taken.
    When I run free all the memory is used up:

    total used free shared buffers
    cached
    Mem: 8164176 8145112 19064 0 70096
    7633360
    -/+ buffers/cache: 441656 7722520
    Swap: 4194296 467292 3727004


    cat /proc/meminfo shows:


    MemTotal: 8164176 kB
    MemFree: 20344 kB
    Buffers: 93028 kB
    Cached: 7598528 kB
    SwapCached: 26308 kB
    Active: 1323876 kB
    Inactive: 6633240 kB
    HighTotal: 0 kB
    HighFree: 0 kB
    LowTotal: 8164176 kB
    LowFree: 20344 kB
    SwapTotal: 4194296 kB
    SwapFree: 3726992 kB
    Dirty: 2068 kB
    Writeback: 0 kB
    Mapped: 1297384 kB
    Slab: 110616 kB
    CommitLimit: 8276384 kB
    Committed_AS: 5536800 kB
    PageTables: 47016 kB
    VmallocTotal: 536870911 kB
    VmallocUsed: 265396 kB
    VmallocChunk: 536604667 kB
    HugePages_Total: 0
    HugePages_Free: 0
    Hugepagesize: 2048 kB


    any advise would be helpful.


  2. Re: memory issue

    On Wed, 27 Jun 2007 06:54:44 -0700, rogv24 wrote:

    > I joined a company and I noticed Oracle 10g installed on linux server
    > with 8 GB of ram.
    > I can't seem to understand why all the memory is taken. When I run free
    > all the memory is used up:
    >
    > total used free shared buffers
    > cached
    > Mem: 8164176 8145112 19064 0 70096 7633360
    > -/+ buffers/cache: 441656 7722520 Swap: 4194296 467292
    > 3727004
    >
    >
    > cat /proc/meminfo shows:
    >
    >
    > MemTotal: 8164176 kB
    > MemFree: 20344 kB
    > Buffers: 93028 kB
    > Cached: 7598528 kB
    > SwapCached: 26308 kB
    > Active: 1323876 kB
    > Inactive: 6633240 kB
    > HighTotal: 0 kB
    > HighFree: 0 kB
    > LowTotal: 8164176 kB
    > LowFree: 20344 kB
    > SwapTotal: 4194296 kB
    > SwapFree: 3726992 kB
    > Dirty: 2068 kB
    > Writeback: 0 kB
    > Mapped: 1297384 kB
    > Slab: 110616 kB
    > CommitLimit: 8276384 kB
    > Committed_AS: 5536800 kB
    > PageTables: 47016 kB
    > VmallocTotal: 536870911 kB
    > VmallocUsed: 265396 kB
    > VmallocChunk: 536604667 kB
    > HugePages_Total: 0
    > HugePages_Free: 0
    > Hugepagesize: 2048 kB
    >
    >
    > any advise would be helpful.


    It's being used by the cache, that's perfectly normal. Any available
    memory is used as a file cache, that makes a huge performance difference
    because accesses to the cache are orders of magnitude faster then
    accesses to the disk. If the OS needs space for something else it will
    push some of the cached objects out and allocate the space to the higher
    priority process.

  3. Re: memory issue

    On Jun 27, 10:19 am, General Schvantzkoph
    wrote:
    > On Wed, 27 Jun 2007 06:54:44 -0700, rogv24 wrote:
    > > I joined a company and I noticed Oracle 10g installed on linux server
    > > with 8 GB of ram.
    > > I can't seem to understand why all the memory is taken. When I run free
    > > all the memory is used up:

    >
    > > total used free shared buffers
    > > cached
    > > Mem: 8164176 8145112 19064 0 70096 7633360
    > > -/+ buffers/cache: 441656 7722520 Swap: 4194296 467292
    > > 3727004

    >
    > > cat /proc/meminfo shows:

    >
    > > MemTotal: 8164176 kB
    > > MemFree: 20344 kB
    > > Buffers: 93028 kB
    > > Cached: 7598528 kB
    > > SwapCached: 26308 kB
    > > Active: 1323876 kB
    > > Inactive: 6633240 kB
    > > HighTotal: 0 kB
    > > HighFree: 0 kB
    > > LowTotal: 8164176 kB
    > > LowFree: 20344 kB
    > > SwapTotal: 4194296 kB
    > > SwapFree: 3726992 kB
    > > Dirty: 2068 kB
    > > Writeback: 0 kB
    > > Mapped: 1297384 kB
    > > Slab: 110616 kB
    > > CommitLimit: 8276384 kB
    > > Committed_AS: 5536800 kB
    > > PageTables: 47016 kB
    > > VmallocTotal: 536870911 kB
    > > VmallocUsed: 265396 kB
    > > VmallocChunk: 536604667 kB
    > > HugePages_Total: 0
    > > HugePages_Free: 0
    > > Hugepagesize: 2048 kB

    >
    > > any advise would be helpful.

    >
    > It's being used by the cache, that's perfectly normal. Any available
    > memory is used as a file cache, that makes a huge performance difference
    > because accesses to the cache are orders of magnitude faster then
    > accesses to the disk. If the OS needs space for something else it will
    > push some of the cached objects out and allocate the space to the higher
    > priority process.- Hide quoted text -
    >
    > - Show quoted text -


    Thanks for the input


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