Re: Latency data - 2.6.14-rc3-rt13
From: Steven Rostedt
Date: Wed Oct 12 2005 - 01:45:55 EST
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%
If the swap starts to increase slowly over time, you _do_ have a
leak somewhere. Probably not in the kernel (kernel memory never goes into
swap). But if you want to see if the kernel is leaking, examine
/proc/slabinfo once in a while and if you see something there constantly
growing, then that might indicate a leak. Just pay attention to the first
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