[CentOS] Re: why is this machine using swap space?
William L. Maltby
BillsCentOS at triad.rr.com
Fri Jul 21 17:52:44 UTC 2006
On Fri, 2006-07-21 at 12:36 -0500, Larry Vaden wrote:
> On 7/21/06, William L. Maltby <BillsCentOS at triad.rr.com> wrote:
> > On Fri, 2006-07-21 at 12:10 -0500, Larry Vaden wrote:
> > > On 7/21/06, Scott Silva <ssilva at sgvwater.com> wrote:
> > > > Larry Vaden spake the following on 7/21/2006 8:05 AM:
> > > > ><snip><snip>
> Here's what got my curiosity up (and wondering why the swap'd item(s)
> didn't eventually expire); the first machine is running sendmail, the
> others are running postfix.
>
> Mem: 1025076k total, 602508k used, 422568k free, 42204k buffers
> Swap: 2031608k total, 600k used, 2031008k free, 506496k cached
>
> Mem: 1295916k total, 719596k used, 576320k free, 70192k buffers
> Swap: 2031608k total, 144k used, 2031464k free, 441984k cached
>
> <snip similar>
In that thread was mentioned a "feature" that came to be considered a
bug. That's why U4 is supposed to remove it. That *maight* affect what
we are seeing. You can reduce even that by using the "swappiness" thing
and considering the other actions mentioned in that thread.
What you show is *not* a problem, IMO, but an irritation. I believe the
memory manager just dumps some *really* inactive pages out so that
buffers and cache (which should be *very* active areas) can get more
memory.
<straight face>
Makes since: why maintain an error trapping routine in memory at the
expense of buffers and/or cache? We *know* there are no bugs that need
trapping, right?
</straight face>
> rgds/ldv
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--
Bill
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