On Wed, Jul 19, 2006 at 11:23:21AM -0300, User Freebsd wrote: > On Wed, 19 Jul 2006, Robert Watson wrote: > > > > >On Wed, 19 Jul 2006, User Freebsd wrote: > > > >>Also note that under FreeBSD 4.x, all three of these machines were pretty > >>much my more solid machines, with even more vServers running on them then > >>I'm able to run with 6.x ... once I got rid of using unionfs, stability > >>skyrocketed :( > >> > >>Hrmmmm ... but, your 'controller driver' comment ... that is one common > >>thing amongst all three servers ... they are all running the iir driver > >>... not sure the *exact* controller, but pluto (older Dual-PIII) shows it > >>as: > > > >Yes, this was going to be my next question -- if you're seeing wedges > >under load and there's a common controller in use, maybe we're looking at > >a driver bug. Bugs of those sort typically look a lot like what you > >describe: an I/O is "lost" and so eveything that depends on the I/O wedges > >waiting for it, leading to a lot of processes hanging around waiting for > >vnode locks, etc. > > 'k, but how do we debug *that*? :( If it was one, I'd suspect hardware > ... but *three*, and only acting up *after* upgrading to FreeBSD 6.x, and > only acting up under load ...
Obvious step would be to replace controller by some different kind.
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