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    SubjectRe: Latency data - 2.6.14-rc3-rt13
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    On Wed, 2005-10-12 at 02:38 -0400, Steven Rostedt wrote:
    > On Tue, 11 Oct 2005, Lee Revell wrote:
    >
    > > On Tue, 2005-10-11 at 18:09 -0700, Mark Knecht wrote:
    > > > Should free memory drop like that over time?
    > >
    > > Yes this is perfectly normal. When a system first boots all the memory
    > > your apps aren't using is initially free. As applications access more
    > > data over time then it will be cached in memory until free memory drops
    > > to near zero.
    > >
    > > "Free memory" is actually wasted memory - it's better to use all
    > > available RAM for caching.
    > >
    >
    > But the swap being touched bothers me. Although I've had problems with
    > leaving Mozilla up for long times and it leaking. Without Mozilla running
    > and running lots of other apps, I have almost 100% memory used, but 0%
    > swap.

    I believe this is the expected behavior under 2.6 unless you
    set /proc/sys/vm/swappiness to 0. If an app allocates memory and then
    never touches it then those pages will eventually be swapped out to make
    room for hot ones.

    Lee

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