System low on memory+swap shortage message

[Matthew Dillon]

Continue monitoring the wired pages (from systat -vm 1) on your system with
the new kernel and see if those tick-up from day to day.

-Matt

On Tue, Aug 18, 2015 at 3:49 AM, YONETANI Tomokazu <y0n3t4n1 at gmail.com>
wrote:

> Hi,
>
> On Sun, Aug 16, 2015 at 05:09:27PM -0700, Matthew Dillon wrote:
> > There are numerous possibilities.  For example, tmpfs use.  You could
> check
> > if the wired page count has become excessive (could be an indication of a
> > leak).  There was a bug fix made in master related to a memory leak from
> > locked memory that was fixed on July 12 (a51ba7a69d2c5084f2 in master),
> you
> > could try cherry-picking that one into your local tree and see if it
> helps.
> >
> > You'll need to do some more investigation.  The most likely possibility
> is
> > tmpfs use.  The wired memory leak is a possibility too but depends on the
> > system workload.
>
> Thank you for the hints and cherry-picking the fix.  I updated the box
> with the new source this morning, and I'll come back with the new result
> later.
>
> On Sun, Aug 16, 2015 at 10:27:08PM +0800, Nuno Antunes wrote:
> > Any clue in vmstat -m ?
>
> On older kernel, it looked like this; mostly occupied by vfscache,
> then vnodes and HAMMER-inodes.  so I'm guessing either hammer cleanup,
> updating the locate db, or git pull may have increased the usage.
> tmpfs-related numbers were less than 100, on the other hand.
>
> $ sed -E 's/^(.{20})(.{7})(.*)$/\2&/' vmstat-m-before  |sort -nr |sed
> 's/^.......//' |head -n5
>            vfscache 881481  81743K      0K     764928K   1033104    0     0
>              vnodes 420508 170832K      0K  134203388K    420508    0     0
>       HAMMER-inodes 404482 353922K      0K  134203388K    416101    0     0
>       HAMMER-others   3994    720K      0K     764928K   3754450    0     0
>               devfs   3803    602K      0K     764928K      4382    0     0
>
>
> Best Regards,
> YONETANI Tomokazu.
>
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