Return-Path: Delivered-To: apmail-httpd-dev-archive@httpd.apache.org Received: (qmail 4081 invoked by uid 500); 2 Jan 2002 21:54:51 -0000 Mailing-List: contact dev-help@httpd.apache.org; run by ezmlm Precedence: bulk Reply-To: dev@httpd.apache.org list-help: list-unsubscribe: list-post: Delivered-To: mailing list dev@httpd.apache.org Received: (qmail 4068 invoked from network); 2 Jan 2002 21:54:51 -0000 Sender: gregames@Mail.MeepZor.Com Message-ID: <3C338188.6C082C56@remulak.net> Date: Wed, 02 Jan 2002 16:54:16 -0500 From: Greg Ames X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.2.19-10mdk i686) X-Accept-Language: en MIME-Version: 1.0 To: dev@httpd.apache.org Subject: Re: 2.0.30-dev load spiking [was: upgrade to FreeBSD 4.5-PRERELEASE] References: <3C336A1D.5537B116@remulak.net> <3C337E64.9060202@cnet.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N Brian Pane wrote: > > Greg Ames wrote: > > >Jeff & I discussed how to troubleshoot this baby. Some thoughts: > >* compare trusses and look for abnormalities > >* scrutinize the error logs > >* calculate and log how much CPU time each request takes, the thought > >being that some requests are burning a lot more CPU than they used to. > > > >Any other ideas? > > > > One more thought: I graphed the CPU utilization from your vmstat > output, and the spike is mostly sys time, not usr. So truss/strace > data may be helpful--especially if truss on that platform can measure > the time spent in each syscall. truss doesn't measure time on FreeBSD according to the man page. But maybe there are a lot more syscalls in the failing case, so I'll try it. Greg