Date: Sat, 14 Dec 2002 13:42:00 -0800 (PST) From: John Merryweather Cooper <john_m_cooper@yahoo.com> To: Rob <rob@pythonemproject.com> Cc: freebsd-stable@freebsd.org Subject: Re: Performance tuning on -stable for a dummy :) Message-ID: <20021214214200.18355.qmail@web20706.mail.yahoo.com> In-Reply-To: <3DFB96F5.95440BD8@pythonemproject.com>
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I presume you've done a $ man tuning and have taken in the contents? The suggestions are pretty good. But before one gets to tweaking things, I think it's good practice to strip down the kernel to what you need. Everything that's just along for the ride is consuming resources in some manner; so, trim the dead weight. This is particularly true of CPU support your system doesn't need. While you're trimming, read /sys/i386/conf/LINT and its comments--there's plenty of useful information there. In particular, there's some discussion about mbufs and configuring the amount of mbufs using either kernel configuration or sysctl/loader conf values. Then, after you've gotten a lean-and-mean kernel, play with the tuneables described in man tuning. Increase the most likely values one at a time until: 1) you eliminate that value as a reasonable source of the problem; or 2) you reach a value where exhaustion doesn't occur. Note that it may be desirable to increase physical memory since 4.7-STABLE does some default tuning itself depending on available memory. jmc --- Rob <rob@pythonemproject.com> wrote: > Hi John, > > Oops Sorry: > > FreeBSD -stable. Here is uname: > > FreeBSD lm741n.dyndns.org 4.7-STABLE FreeBSD > 4.7-STABLE #0: Wed Dec 4 > 13:14:24 PST 2002 > root@lm741n.dyndns.org:/usr/src/sys/compile/ROBKERN3 > i386 > > There are no tuning specific tweeks to the kernel. > Generic minus all > the unneeded drivers plus audio and ipf. > > The Freenet server uses Java, which opens up alot of > connections to > other Freenet nodes. Its an anonymous encrypted > distributed P2P > network. And Java always seems to use an unusually > high amount of > memory even when the server isn't loaded heavily. > I'm currently using > Kaffe 1.0.7. It is much better in that respect than > the linux-sun java > distributions. > > In the case I run out of mbuf, I have a program > which is inserting a web > site into the network which contains 140 files plus > index.html, anywhere > from 3Mb to 20Mb per file. And the program splits > up the files into > fragments. That is one of the features of the > network, splitfiles. > > Netstat -m shows 446 mbufs right now, but I think it > gets much larger. > Netstat shows also about 42 open connections to > other servers and 39 > connections to localhost. > > Thanks!! > > Rob. > > > > > > John Merryweather Cooper wrote: > > > > The version of FreeBSD you're running makes a BIG > > difference. The list will need to know that > first. > > Also, what sort of load are you putting on this > server > > and how? > > > > jmc > > > > --- Rob <rob@pythonemproject.com> wrote: > > > Hi all, > > > > > > I ran into my first FreeBSD stock limitation. > Ran > > > out of mbuf. > > > > > > I'm running a Freenet server on an Asus A7V8K > with > > > Athlon 2400+ and 1 > > > Gig ram, plus two 15krpm SCSI 160 drives. > > > > > > I read the tuning man page and went back through > > > alot of the email > > > archives, but there is a lack of practical > examples. > > > This is the only > > > one I found: > > > > > > kern.ipc.nmbuffers=65536 > > > kern.ipc.maxsocbuf=2097152 > > > kern.ipc.somaxconn=8192 > > > kern.ipc.maxsockets=16424 > > > kern.maxfiles=65536 > > > kern.maxfilesperproc=32768 > > > etc,etc > > > > > > What is a good /boot/loader.conf for a someone > like > > > me? I don't totally > > > understand all of the tunables. Is there a good > URL > > > with info? The > > > mailing list archives were mainly theoretical > and > > > beyond my > > > understanding. > > > > > > Thanks, Rob. > > > -- > > > ----------------------------- > > > The Numeric Python EM Project > > > > > > www.pythonemproject.com > > > > > > > > > To Unsubscribe: send mail to > majordomo@FreeBSD.org > > > with "unsubscribe freebsd-stable" in the body of > the > > message > > > > __________________________________________________ > > Do you Yahoo!? > > Yahoo! Mail Plus - Powerful. Affordable. Sign up > now. > > http://mailplus.yahoo.com > > -- > ----------------------------- > The Numeric Python EM Project > > www.pythonemproject.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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