Date: Mon, 16 Jun 2008 19:48:42 +0200 (CEST) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-questions@FreeBSD.ORG, stuttle@gmail.com Subject: Re: High load, lots of free memory and processes in devfs state Message-ID: <200806161748.m5GHmgkf006333@lurza.secnetix.de> In-Reply-To: <67B08235-6026-44A6-816F-4C862A84566D@gmail.com>
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Stut <stuttle@gmail.com> wrote: > I'm having a serious problem with one of my FreeBSD servers. It runs > FreeBSD 6.2-RELEASE, Apache 2.2.8 and PHP 5.2.1. I've checked the > hardware and it's all OK. There's approximately 400 Apache processes > running and a 2GB memcached instance. > > Up until last weekend this server was working perfectly at a level > of HTTP traffic higher than it's currently getting. Last week our > database server (separate server) died and had to be rebuilt. While > this was being done this server hosted the database. This has now > been completed and the PHP app is pointing back at the dedicated DB > server. > > Top shows the following... > > last pid: 26838; load averages: 10.22, 14.06, 13.55 up > 2+00:34:47 18:03:43 > 619 processes: 1 running, 618 sleeping > CPU states: 4.9% user, 0.0% nice, 24.8% system, 0.4% interrupt, > 70.0% idle > Mem: 2241M Active, 2718M Inact, 462M Wired, 394M Cache, 214M Buf, > 1747M Free > Swap: 8192M Total, 124K Used, 8192M Free > > PID UID THR PRI NICE SIZE RES STATE C TIME WCPU > COMMAND > 26807 80 1 -4 0 79892K 9996K devfs 0 0:00 2.81% > httpd > 26797 80 1 -4 0 82376K 12592K devfs 1 0:00 2.19% > httpd > 26791 80 1 -4 0 82376K 12636K devfs 0 0:00 1.85% > httpd > 26783 80 1 -4 0 82392K 12640K devfs 3 0:00 1.84% > httpd > [...] Please let "vmstat 5" run for a minute ... Anything that looks unusual? Have you checked dmesg? Is this FreeBSD i386 (32bit) or amd64 (64bit)? Have you considered updating? 6.2-RELEASE isn't the freshest anymore. You might even consider going to 7-stable and using the new ULE scheduler which copes better with SMP servers. > As you can see there's plenty of free memory and the CPU is 70% idle > yet the load is sky high. Well, load 10 isn't that much for a 4-way SMP system. Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd "Perl will consistently give you what you want, unless what you want is consistency." -- Larry Wall
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