Date: Tue, 20 Apr 1999 11:42:41 +0930 From: Greg Lehey <grog@lemis.com> To: cjclark@home.com, FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Performance Question Message-ID: <19990420114241.E40482@lemis.com> In-Reply-To: <199904191956.PAA08664@cc942873-a.ewndsr1.nj.home.com>; from Crist J. Clark on Mon, Apr 19, 1999 at 03:56:14PM -0400 References: <199904191956.PAA08664@cc942873-a.ewndsr1.nj.home.com>
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On Monday, 19 April 1999 at 15:56:14 -0400, Crist J. Clark wrote: > We are stuck, along with a lot of ther rest of you out there, with a > lot of existing PC using all IDE hard drives. We also have a > considerable number of 'small' (100-500 MB range) drives that have been > displaced by upgrades to GB sized drives. Bothering to install a bunch > of them in a machine to get what is considered a reasonable amount of > memory now-a-days does not seem worthwhile when you look at how much a > new 3, 8, and up GB drive costs. They are not even big enough to write > a ISO9660 image on to be used as a temporary storage for machines > with CD writers. > > However, they are just about the right size to be used as a swap > device. Unfortunately, I am not enough of a hardware guy to know what > kind of performance increases we may or may not get from using old IDE > drives in such a role. So my question is, on an all IDE system, how > much of a performance increase does one get by moving the swap from a > partition on the same drive that contains the OS and user data to a > separate, dedicated swap drive? Does the performance depend > (significantly) on the way the IDE devices are configured (what is > primary/secondary or master/slave)? That depends, of course, on how much swapping you do. It's impossible to give a generic answer. Note also that if you currently have your swap partition on a SCSI device, and you move it to an IDE drive without DMA, you might actually see a drop in performance. If you run DMA, there should be no problem. Greg -- When replying to this message, please copy the original recipients. For more information, see http://www.lemis.com/questions.html See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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