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    SubjectRe: What is the limit size of tmpfs /dev/shm ?
    On Wed, 6 Feb 2008, H. Peter Anvin wrote:
    >
    > That sounds like a problem in our overall swap handling, not specifically in
    > tmpfs. Now, I can't say anything concrete about heavy swap conditions, but in
    > light swap conditions I have measured a 20x performance improvement(!) over
    > ext3 on real workloads.

    Wow, I'm surprised. I suppose I do jump to thinking of heavy swapping
    when light swapping won't be so bad; but even so, 20x ext3 astonishes
    me - ext3 wouldn't be anyone's choice for fastest, but even so...

    I certainly guess too much and measure too little:
    is there a useful test you could point me to? TIA

    Hugh


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