Re: Over-eager swapping
From: Minchan Kim
Date: Tue Aug 03 2010 - 00:09:23 EST
On Tue, Aug 3, 2010 at 12:31 PM, Chris Webb <chris@xxxxxxxxxxxx> wrote:
> Minchan Kim <minchan.kim@xxxxxxxxx> writes:
>> Another possibility is _zone_reclaim_ in NUMA.
>> Your working set has many anonymous page.
>> The zone_reclaim set priority to ZONE_RECLAIM_PRIORITY.
>> It can make reclaim mode to lumpy so it can page out anon pages.
>> Could you show me /proc/sys/vm/[zone_reclaim_mode/min_unmapped_ratio] ?
> Sure, no problem. On the machine with the /proc/meminfo I showed earlier,
> these are
> # cat /proc/sys/vm/zone_reclaim_mode
> # cat /proc/sys/vm/min_unmapped_ratio
if zone_reclaim_mode is zero, it doesn't swap out anon_pages.
1) How does VM reclaim anonymous pages even though vm_swappiness ==
zero and has big page cache?
2) I doubt file pages of your system is fulled by Buffers while Cached
is almost 10M.
Why is it remained although anon pages is swapped out and cached page
Hmm. I have no idea. :(
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