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From: shwake@raysnec.UUCP (Ray Shwake)
Newsgroups: comp.unix.sysv386
Subject: Re: out of swap space??
Message-ID: <306@raysnec.UUCP>
Date: 25 Apr 91 16:50:53 GMT
References: <1991Apr23.214037.16410@netcom.COM> <1434@loki.une.oz.au>
Organization: IRS/CI - Technical Solutions Branch
Lines: 24

mark@loki.une.oz.au (Mark Garrett ) writes:

>From article <1991Apr23.214037.16410@netcom.COM>, by aed@netcom.COM (Andrew Davidson):
>	As a general rule for reasonable performace 2 to 3 times your real
>memory ie. 16 to 24Mb swap for 8Mb ram

	While this may be the optimum in a given case, as a rule of thumb it
	lacks logic. It implies that, when increasing memory one should also
	increase swap, which is nonsense.

>	What your should be doing however is have a look at the amount of
>swap that your system requires and buy 1/2 to 1/3 that much ram. ie. its no
>good haveing 24Mb swap if your average demand is >= 24Mb . 

	This gets closer to a logical connection. Note your maximum
	anticipated demand. A reasonable fraction of that (say 1/4 - 1/2)
	should be RAM; the rest would be swap. As available RAM approaches
	anticipated demand, one can *decrease* that allocated for swap,
	and put it to better use. As a rule, one is safer over-estimating
	anticipated demand.


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