On Fri, Nov 21, 2008 at 11:33 PM, zerk <[EMAIL PROTECTED]> wrote: > Hi, > > 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. > > The CPU is at 0% in both cases and nothing is using the array either. I > tried to investigate with DTrace without success... > > Anyone have a clue of what could be going on? > > Thanks > > Zerk > -- >
Ya, you're using gobs of ram that was normally being used by zfs for caching. I would venture to guess if you stuck another 2GB ram in there you'd see far less of a *hit* from X or a VM. --Tim
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