On Fri, 21 Nov 2008, zerk wrote: > I have OpenSolaris on an Amd64 Asus-A8NE with 2gig of Rams and 4x320 gig sata > drives in raidz1. > > With dd, I can write at quasi disk maximum speed of 80meg each for a total of > 250meg/s if I have no Xsession at all (only console tty). > > But as soon as I have an Xsession running, the write speed drops to > about 120MB/s. Its even worse if I have a VBoxHeadless running with > an idle win2k3 inside. It drops to 30 MB/s.
I believe that the OpenSolaris kernel is now extended such that it reports file change events to Gnome for files in the user's home directory. When Gnome hears about a change, then it goes and reads the file so that searching is fast and there is a nice per-generated thumbnail. This means that there is more than simple memory consumption going on. Try writing into the same pool but outside of your home directory and see if the I/O rate improves. If it does, then go complain on the Desktop list. I already complained in advance on the Desktop list but where was little response (as usual) so I have since unsubscribed. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], 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
