Re: Poor performance

Slawa Olhovchenkov <slw_at_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_at_dwp /usr/src% head -18 UPDATING
Updating Information for FreeBSD current users

This file is maintained and copyrighted by M. Warner Losh
<imp_at_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_at_des.no