Date: Thu, 16 Apr 1998 14:27:25 -0500 From: Ted Spradley <tsprad@set.spradley.tmi.net> To: lrios <lrios@ziplink.net> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Linux And FreeBSD Message-ID: <E0yPuJh-0005fy-00@set.spradley.tmi.net> In-Reply-To: Your message of "Thu, 16 Apr 1998 14:49:28 EDT." <Pine.BSF.3.96.980416143919.1928E-100000@zip1.ziplink.net>
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You haven't said anything about performance except for email. What you need to do first is determine if your performance problem is the whole system, doing anything, or is it just email. If other stuff (like "make buildworld", that's a good seat-of-the-pants general performance test) seems as fast as you'd expect, then quit worrying about memory management and focus your attention on your email configuration. I'm certainly no expert on sendmail configuration, so I can't suggest where the problem might be, but I would bet that there's something really wrong, like the mail's all going to Timbuktu and bouncing back. On the other hand, if everything is really slow then it may be some very basic hardware misconfiguration. Look for a really basic hardware test program you can boot from a floppy. You might find something helpful (in this case) from Dr. Thomas Pabst's Web pages (http://sysdoc.pair.com/ if I recall). How are you testing the email performance? Are you putting it into production and letting the users pound it, or is there some kind of test generator driving it? If it's a test generator, then how do you know that's not the bottleneck? You did say the machine is 90% idle. Maybe you're just not driving it hard enough. Did your consultant tell you there was a memory management problem? ;-) > Could someone please explain to me why a Linux 75 mhz machine kicks the > hell out of a FreeBSD with a Pentium II 266mhz 256M Ram and two ultra-wide > fast SCSI drives??? > > I love BSD but for performance reasons linux may be my choice. > > Any performance tips would be helpful... > > > My linux machine puts out about 700 (locally)emails a minute while BSD > only puts > out about 200... my limits appear to configured properly. My kernel > options have been set.. Is there anything that I'm missing to get this > machine to work??? The only difference between the two is that the Linux > Box is working like a dog while the BSD box doesn't go above .05 load and > stays around 90 idle > > What are the differences in memory managers between the two?? > I've got a consultant here trying to get linux to do everything but with > the numbers I'm seeing it's hard to stay loyal.. Please help!! > ______ __ > /___ / / / __ > / /(@)__ / (@)__ / /__ lrios@ziplink.net > / // / _ \/ / / _ \/ '_/ > / //_/ .__/_/_/_//_/_/\_\ NASA TEAM > / /__/_/___________________ `He who dies with the most toys win!` > /___________________________ > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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