Date: Sun, 14 Dec 2003 01:55:40 +0100 From: des@des.no (Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?=) To: freebsd-current@freebsd.org Subject: Re: Poor performance Message-ID: <xzpu144z08j.fsf@dwp.des.no> In-Reply-To: <20031213230112.GP33115@mail.acropolis.ru> (Slawa Olhovchenkov's message of "Sun, 14 Dec 2003 02:01:12 %2B0300") References: <20031213230112.GP33115@mail.acropolis.ru>
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Slawa Olhovchenkov <slw@zxy.spb.ru> writes:
> I have upgrade web server from 4.7 to current (cvsup date 2003.12.08.06.40.00)
> and have degradation performance.
des@dwp /usr/src% head -18 UPDATING
Updating Information for FreeBSD current users
This file is maintained and copyrighted by M. Warner Losh
<imp@village.org>. See end of file for further details. For commonly
done items, please see the COMMON ITEMS: section later in the file.
NOTE TO PEOPLE WHO THINK THAT FreeBSD 5.x IS SLOW:
FreeBSD 5.x has many debugging features turned on, in
both the kernel and userland. These features attempt to detect
incorrect use of system primitives, and encourage loud failure
through extra sanity checking and fail stop semantics. They
also substantially impact system performance. If you want to
do performance measurement, benchmarking, and optimization,
you'll want to turn them off. This includes various WITNESS-
related kernel options, INVARIANTS, malloc debugging flags
in userland, and various verbose features in the kernel. Many
developers choose to disable these features on build machines
to maximize performance.
DES
--
Dag-Erling Smørgrav - des@des.no
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