Messages in this thread | | | Subject | Re: Latency data - 2.6.14-rc3-rt13 | From | Lee Revell <> | Date | Wed, 12 Oct 2005 12:18:22 -0400 |
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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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