Date: Sun, 04 Nov 2007 16:00:50 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: Thomas Sparrevohn <Thomas.Sparrevohn@btinternet.com> Cc: freebsd-current@freebsd.org, Peter Schuller <peter.schuller@infidyne.com> Subject: Re: ZFS Hangs Message-ID: <472DDEA2.7080804@FreeBSD.org> In-Reply-To: <200711041423.54336.Thomas.Sparrevohn@btinternet.com> References: <200711021208.25913.Thomas.Sparrevohn@btinternet.com> <472D9B2A.5080900@FreeBSD.org> <200711041302.08877.peter.schuller@infidyne.com> <200711041423.54336.Thomas.Sparrevohn@btinternet.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Thomas Sparrevohn wrote: > On Sunday 04 November 2007 12:02:08 Peter Schuller wrote: >>> It certainly could be a caching effect but the particular problem you >>> were seeing should have been fixed. Are you still seeing it? >> I am not still seeing it; the machine has since been switched to AMD 64, and >> RAM increased from 1 GB to 3 GB (and FreeBSD itself upgraded several times >> since then). I did not look into it in terrible detail; I just observed by >> tracing that the I/O in question was definitely the package database, and >> that it was definitely accessing the same files mutiple times. I assumed it >> was a caching effect at the time, given all the maxvnode tweaking and sizing >> restrictions put on the ARC. I do know I never saw it after the memory >> increase. >> >> Also, this might have been prior to disabling prefetch. If it was, perhaps the >> prefetch hosed the cache. (Are the prefetch issues still there, anyone?) >> > > Hmm. I seeing the hang now - but had not been seeing it before as I had increased the arc cache > size - seems a very low arc_max - its about 300MB on a 4GB amd64 system > > However ZFS haning in "zfs:(&zio_cv_io)" is new - I have been running this system using ZFS for month > without any trouble - The only change I can think of is that the devices has been changes to ATA RAID 0+1 > apart from that everything worked before the 28/10-2007 - that when I installed the extra disks to change > from RAID 0 - to RAID 0+1 - > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html Kris
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?472DDEA2.7080804>