Re: Might refill_inactive_zone () be too aggressive?

[William Lee Irwin III <wli@holomorphy.com>]

On Fri, Apr 16, 2004 at 11:18:47PM -0700, William Lee Irwin III wrote:
>> A very interesting point there. The tendency to set reclaim_mapped = 1
>> is controlled by /proc/sys/vm/swappiness; setting that to 0 may improve
>> your performance or behave closer to how the case you cited where vmscan.c
>> never sets reclaim_mapped = 1 improved performance.
>> The default value is 60, which begins unmapping mapped memory about
>> when 40% of memory is mapped by userspace.

On Sat, Apr 17, 2004 at 07:08:12AM -0700, Marc Singer wrote:
> I did a little more looking at when reclaim_mapped is set to one.  In
> my case, I don't think that very much memory is mapped.  I've got one
> program running that has one or two code pages, there may be some
> libraries.  The system has 28MiB of free RAM.  I don't see how I could
> be getting more than 20% of RAM mapped.

Also, it would be helpful to log periodic snapshots of /proc/meminfo and
/proc/vmstat to see what's being fed to the various heuristics.


-- wli

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