Date: Sun, 04 Nov 2007 11:12:58 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: Peter Schuller <peter.schuller@infidyne.com> Cc: freebsd-current@freebsd.org Subject: Re: ZFS Hangs Message-ID: <472D9B2A.5080900@FreeBSD.org> In-Reply-To: <200711040948.25732.peter.schuller@infidyne.com> References: <200711021208.25913.Thomas.Sparrevohn@btinternet.com> <20071103164231.GB23714@outcold.yadt.co.uk> <200711040948.25732.peter.schuller@infidyne.com>
index | next in thread | previous in thread | raw e-mail
Peter Schuller wrote: >> For example, pkg_delete seems to be _extremely_ slow and ^T reports that >> it is stuck waiting on zfs:(&zio->io_cv) for an unreasonable (IMO) amount >> of time. > > FWIW, I have seen pkg_install (and possibly other pkg_* tools) being extremely > slow seemingly as a result of the active set of files it touches exceededing > the amount cached. In particular I had this problem after converting to ZFS, > but prior to switching to amd64 and more RAM. > > It would sit and churn on disk I/O forever, entirely seek bound. Tracing the > processes showed it traversing the package database over and over (presumably > recursively following dependencies or some such). So the same files were > touched any number of times. As a result, with too little cached, runtime > exploded (it took hours and hours upgrading my desktop using *binary* > pre-built packages because the larger packages with a lot of dependencies > would take forever to install and delete). It certainly could be a caching effect but the particular problem you were seeing should have been fixed. Are you still seeing it? Can the OP report whether e.g. gstat shows disk activity? Krishome | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?472D9B2A.5080900>