Date: Mon, 28 Jan 2002 17:35:01 +0100 From: Erik Trulsson <ertr1013@student.uu.se> To: Chris Corayer <CCorayer@adetech.com> Cc: "'questions@FreeBSD.ORG'" <questions@FreeBSD.ORG> Subject: Re: Swap space questions. Message-ID: <20020128163501.GA85786@student.uu.se> In-Reply-To: <DDB0EE290EC6D41190F000D0B73C6A1F021FD0BA@adehqmail.ade.com> References: <DDB0EE290EC6D41190F000D0B73C6A1F021FD0BA@adehqmail.ade.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, Jan 28, 2002 at 11:07:28AM -0500, Chris Corayer wrote: > I have an old Alpha Server. It currently has 6 disks in it. I also have > another dual P3 system with five disks. How many of those disks can/should > have swap space? I recall reading in the handbook somewhere that it there > should be no more than 4. Why not? By default the kernel cannot handle more than 4 swap devices at once. To change this you need to recompile the kernel after adding the line options NSWAPDEV=4 to your kernel config file. (With '4' changed to the number of swapdevices you need.) Increasing this value increases the memory needed by the kernel so don't make it too large. > > I've also read that the swap should not be the first partition/slice? on the > disk. Does this apply only for the first disk with / on it, or for all of > them? AFAIK you can put the swap wherever you want on the disk. For example I have the following layout: (output from 'disklabel ad0') 8 partitions: # size offset fstype [fsize bsize bps/cpg] a: 163840 409600 4.2BSD 0 0 0 # (Cyl. 27*- 37*) b: 409600 0 swap # (Cyl. 0 - 27*) c: 16510977 0 unused 0 0 # (Cyl. 0 - 1091*) e: 1331200 573440 4.2BSD 0 0 0 # (Cyl. 37*- 125*) f: 3809280 1904640 4.2BSD 1024 8192 24 # (Cyl. 125*- 377*) g: 10797057 5713920 4.2BSD 0 0 0 # (Cyl. 377*- 1091*) Note that swap is indeed the first thing on the disk. This has not caused any problems for me. > > Can anyone point me to more definitive answers? > > Thank you in advance. -- <Insert your favourite quote here.> Erik Trulsson ertr1013@student.uu.se To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020128163501.GA85786>