ZFSKnownProblems - needs revision? / Lighttpd

Miroslav Lachman 000.fbsd at quip.cz
Thu Apr 9 07:56:24 UTC 2009

Ivan Voras wrote:
> 2009/4/8 Miroslav Lachman <000.fbsd at quip.cz>:
>>(Lighttpd problem may be related to jail instead of ZFS - I did not test it
> 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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