Date: Sat, 29 Jan 2005 18:04:53 -0800 From: "Michael C. Shultz" <reso3w83@verizon.net> To: freebsd-questions@freebsd.org Cc: "Chad Leigh -- Shire.Net LLC" <chad@shire.net> Subject: Re: how to monitor system resources etc Message-ID: <200501291804.54402.reso3w83@verizon.net> In-Reply-To: <A55CD388-7262-11D9-B843-000D93B51096@shire.net> References: <A55CD388-7262-11D9-B843-000D93B51096@shire.net>
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On Saturday 29 January 2005 05:59 pm, Chad Leigh -- Shire.Net LLC wrote: > Hi > > I am having a problem with apache/php/mysql or something. One > customers stuff tends to blow the machine up. I would like to be able > to monitor stuff and never remember the tools etc to monitor things. > Process slots, memory, buffers, etc. (I always remember how to look > at mbufs buffers though) or whatever else I can look at and see if we > are hitting a limit. Any pointers to stuff that explains the best > way to track things down would be great. > > This is on 4.9/10 for now. > > Sorry for being so vague. I am not getting anything in > /var/log/messages and the mysql and apache logs don't give a lot. > > Symptoms are lots of httpsd child processes in sbwait and a few in > lockf state. All of a sudden load goes up from <1 or 1-2 range to > over 200 and the swap space starts to rapidly fill (I suspect load is > caused by the excessive swapping). The swapfile is getting up to > about 55% full before it starts to fix itself). (2GB RAM, 4GB swap > --- 2 x 2gb -- dual AMD Athlon MP machine). It will fix itself after > a while and the load will go down as will the swap usage, but mysql > or the php stuff or one of them is still hung up and won't respond. > The apache only handles this site. Other customers have their own > apache installations. > > Apache is 1.3.33+ssl (ben-ssl) > Mysql is now 4.1.9 > php is 5.0.3 > > > Thanks > Chad > I'd start with fstat and see if your customer is leaving too many open files. Here is a good link about fstat: http://www.onlamp.com/pub/a/bsd/2002/09/26/Big_Scary_Daemons.html?page=1 -Mike
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