On Sun, 9 May 2010, Edward Ned Harvey wrote:
So, Bob, rub it in if you wish. ;-) I was wrong. I knew the behavior in Linux, which Roy seconded as "most OSes," and apparently we both assumed the same here, but that was wrong. I don't know if solaris and opensolaris both have the same swap behavior. I don't know if there's *ever* a situation where solaris/opensolaris would swap idle processes. But there's at least evidence that my two servers have not, or do not.
Solaris and Linux are different in many ways since they are completely different operating systems. Solaris 2.X has never swapped processes. It only sends dirty pages to the paging device if there is a shortage of pages when more are requested, or if there are not enough free, but first it will purge seldom accessed read-only pages which can easily be restored. Zfs has changed things up again by not caching file data via the "unified page cache" and using a specialized ARC instead. It seems that simple paging and MMU control was found not to be smart enough.
Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
