Date: Thu, 09 Apr 2009 09:56:01 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: ZFSKnownProblems - needs revision? / Lighttpd Message-ID: <49DDAA11.1040804@quip.cz> In-Reply-To: <9bbcef730904081535l2339dc7fk6ce7957976d9425@mail.gmail.com> References: <gri5d9$15l$1@ger.gmane.org> <gri6io$4n7$1@ger.gmane.org> <49DD1E2E.4030009@quip.cz> <9bbcef730904081535l2339dc7fk6ce7957976d9425@mail.gmail.com>
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Ivan Voras wrote: > 2009/4/8 Miroslav Lachman <000.fbsd@quip.cz>: > >>(Lighttpd problem may be related to jail instead of ZFS - I did not test it >>yet) > > Completely unrelated to ZFS, but wasn't there some issue with lighttpd > and sendfile() relatively recently (sendfile is the default)? Have you > tried server.network-backend = "writev" ? I know about the problem with sendfile as I was hit by it on the main server with Lighttpd + UFS. It has different behavior and it was fixed in the latest version of Lighttpd from ports. Both servers (main with UFS and second with ZFS + Jail) are running this fixed version. I will test it with "writev", thanks for suggestion. With lower load, Lighttpd is shown in `top` with state 'kqread', but with higher load in the case of slowdown, the state is 'zfs->io'. Miroslav Lachman
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