Date: Tue, 29 Oct 1996 15:40:25 +0200 (EET) From: mika ruohotie <bsdcur@shadows.aeon.net> To: dyson@FreeBSD.org Cc: dtc@scrooge.ee.swin.oz.au, current@FreeBSD.org Subject: Re: Request to add this to FAQ re: swap space Message-ID: <199610291340.PAA24942@shadows.aeon.net> In-Reply-To: <199610290207.VAA04150@dyson.iquest.net> from "John S. Dyson" at "Oct 28, 96 09:07:20 pm"
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> The most accurate external indication of swap space reqs is in /proc/???/map > for ranges that are mapped COW and rw access; So it would be interesting to > compare the ps virtual size with the proc filesystem on various machines. > That still doesn't account for SYSV shared memory regions (which can be > paged also.) will there be a program available for reading /proc/???/map in any time soon? > I agree that more swap is better, but at least we need to KILL the notion > that 2 X RAM is enough (IMO, 2 X RAM is never enough)!!! somehow, i've learned the formula for swap space to be 3.5 * ram wasnt that the "old" unix way? or something. is there _any_ disadvantages from having a _lots_ of swap? since on "small" machines i tend to use, depending the amount of drives, swap from 24 to 72 megs... on each drives. on servers i tend to use 128 megs on each drive, and i always have atleast two drives... assuming i'd have 6 drives i would have some 700+ megs of swap, and probably "just" 128 megs ram, would i run into troubles? (with 2gig drive it's "easy" to give out 128 megs for swap) what i mean, is there a number above which i'd get into troubles? (like say 1024 megs) what kinds of swap spaces one needs on a news server? on a web server? i rather would not swap at all, but i'm not the one who pays the ram... =) > John mickey
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