Date: Thu, 06 Mar 2008 11:40:07 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: Neil Darlow <neil@darlow.co.uk> Cc: freebsd-questions@freebsd.org Subject: Re: syslogd and bzip2 hogs after 6.3 to 7.0 upgrade Message-ID: <47CFCA07.4020100@FreeBSD.org> In-Reply-To: <47CFC032.10806@darlow.co.uk> References: <47CFC032.10806@darlow.co.uk>
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Neil Darlow wrote: > Hi, > > I have recently upgraded from RELENG_6_3 to RELENG_7_0 via the source > method. I followed the upgrade instructions in the 7.0 release notes and > rebuilt all ports successfully. > > My hardware is a VIA EPIA PD10000 (VIA Centerhauls CPU) with gmirrored > IDE disks and GELI encrypted swap (using padlock). > > My kernel is GENERIC with removal of 386, 486 and 585 CPU support and > addition of options for: > > DEVICE_POLLING, HZ=1000, ALTQ, PFLOG, PFSYNC and QUOTA. > > I use PF for my firewalling and device polling on my two integrated Via > Rhine NICs. > > This setup worked great under RELENG_6_2 and RELENG_6_3 (only for a > short period due to RELENG_7_0 becoming available) with absolutely no > issues whatever. > > Since upgrading to RELENG_7_0 I have a problem when the nightly rotation > of logfiles occurs. A number of bzip2 processes appear which, with > syslogd, consume huge amounts of CPU. FreeBSD 7 switches to bzipping logfiles rather than gzipping. > Looking at the output of "top" I see that my interrupt CPU usage has > increased to 46% and userland CPU usage to 44%. The remainder is system > and there is no idle CPU time left. This should be unrelated to bzip since that is purely CPU bound. What is causing the interrupts? Check vmstat -i. That is likely to be your real problem. Kris
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