On Feb 26, 2010, at 12:20 PM, Ronny Egner wrote: > Hi Richard, > > r...@openstorage:~# echo "swapfs_minfree/D" | mdb -k > swapfs_minfree: > swapfs_minfree: 2358757 > > > 2358757 pages * 4 KB = 9435028 Kb = 9.2 GB > > So there is my memory :-)
I believe so. > > If i read the documentation correctly this parameter has to be set in > /etc/system? There is an interesting (to me :-) discussion about this in http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=4469865 The way I see this is that the rule of 7/8 memory or memory - 1GB is, for all practical purposes, just 7/8 of memory because the ARC will begin reclaiming as it crosses the 7/8 threshold. Obviously, the box needs to have more than 8GB before this is noticeable. I think it is quite reasonable to set this to a lower value for a storage server with lots of memory because you don't expect to have a sudden need for large quantities of swap. See also http://docs.sun.com/app/docs/doc/819-2724/chapter2-125?a=view -- richard ZFS storage and performance consulting at http://www.RichardElling.com ZFS training on deduplication, NexentaStor, and NAS performance http://nexenta-atlanta.eventbrite.com (March 16-18, 2010) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
