swap zone exhausted, increase kern.maxswzone
dillon at apollo.backplane.com
Sat May 5 20:11:39 UTC 2007
:That's why I think that the socket issue and this one are co-related ... with
:everything started up (93 jails), my swap usage right now is:
:mars# pstat -s
:Device 1K-blocks Used Avail Capacity
:/dev/da0s1b 8388608 20 8388588 0%
:Its only been up 2.5 hours so far, but still, everything is started up ...
:Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
The "swap zone exhausted, increase kern.maxswzone" message only prints
if uma_zone_exhausted() returns TRUE. uma_zone_exhausted() appears to
be based on a UMA flag which is only set if the pages for the zone
exceeds some maximum setting.
Insofar as I can tell, vmstat -z on FreeBSD will dump the UMA zones,
so try using that when the problem occurs along with pstat -s. It
sounds like there is a leak somewhere (but I don't see how anything
in any other UMA zones could cause the SWAPMETA zone to fill up). Or
the maximum setting is too low, or something is getting lost somewhere.
We'll have a better idea as to what is going on when you get the message
again. You might even want to do a once-a-10-minutes cron job to
append pstat -s, vmstat -m, and vmstat -z to a file.
<dillon at backplane.com>
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