Last April we put this in /etc/system on a T2000 server with large ZFS
filesystems:
set pg_contig_disable=1
This was while we were attempting to solve a couple of ZFS problems
that were eventually fixed with an IDR. Since then, we've removed
the IDR and brought the system up to Solaris 10 10/09 with current
patches. It's stable now, but seems slower.
This line was a workaround for bug 6642475 that had to do with
searching for for large contiguous pages. The result was high system
time and slow response. I can't find any public information on this
bug, although I assume it's been fixed by now. It may have only
affected Oracle database.
I'd like to remove this line from /etc/system now, but I don't know
if it will have any adverse effect on ZFS or the Cyrus IMAP server
that runs on this machine. Does anyone know if ZFS uses large memory
pages?
--
-Gary Mills- -Unix Group- -Computer and Network Services-
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