Date: Tue, 12 Jan 1999 07:16:16 -0500 (EST) From: tom@tomqnx.com (Tom Torrance at home) To: culverk@wam.umd.edu (Kenneth Wayne Culver) Cc: current@FreeBSD.ORG Subject: Re: SOFTUPDATES question Message-ID: <m1002k4-000I0SC@TomQNX.tomqnx.com> In-Reply-To: <Pine.GSO.3.95q.990111161048.12894D-100000@rac9.wam.umd.edu> from Kenneth Wayne Culver at "Jan 11, 1999 4:13:42 pm"
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> > What are the pros and cons of defining an extra swapfile that > > resides on a partition where SOFTUPDATES are enabled? > > > > Please do a group reply, as I am not registered for 'questions' list. > > > > Regards, > > Tom > Well, SOFTUPDATES are just a way of speeding things up. . Especially if > you have a slower hard drive. I personally havn't ever done this with a > swapfile, but I'm sure that swap writes would be improved much. Basically > what softupdates allows is async writes to a filesystem without the risks. I'm not so sure - essentially softupdates updates in memory and drags its feet a lot before writing to the actual disk. A swap file on the other hand wants its data written immediately to free up the associated memory. I have a feeling that the softupdates usage would actually increase memory usage, thereby increasing the swap file utilization - a vicious circle. Anyone else have a better feel for this? Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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