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- Newsgroups: comp.unix.ultrix
- Path: sparky!uunet!world!cmr
- From: cmr@world.std.com (Charles M Richmond)
- Subject: Re: Kernel Memory question
- Message-ID: <Bz78rK.JB6@world.std.com>
- Organization: Integrated International Systems Corp. One Longfellow Place, Suite 3309, Boston, Ma.
- References: <1992Dec12.202317.15659@nntpserver.chevron.com> <1992Dec13.044317.26568@decuac.dec.com> <1gem5bINN9e2@wintermute.phys.psu.edu>
- Date: Sun, 13 Dec 1992 13:14:08 GMT
- Lines: 46
-
- kenh@leps5.phys.psu.edu (Ken Hornstein) writes:
-
- >In article <1992Dec13.044317.26568@decuac.dec.com> murphy@ufp.dco.dec.com writes:
- >>"physmem" is used to size several kernel tables; you generally want to have
- >>it be greater than the memory on the system, but it's not that important.
- >>I know of no "wasted memory inherent in ULTRIX". Sounds like nonsense to me..
-
- >(leps5)1 ~> pstat -s
- >65528k swap configured
- >16660k reserved virtual address space
- > 9736k used (4320k text, 0k smem)
- > 55792k free, 2304k wasted, 0k missing
- >avail: 1737*32k 208*1k ^^^^^^
-
- >(I've seen this up in the 10-15M range).
-
- >Quite annoying. Does this go down over time? Or does one have to reboot to
- >get rid of it? Or perhaps a kernel parameter would help reduce the waste?
-
-
-
- Apples and oranges here. The "pstat -s" command is reporting _swap space_
- and _virtual memory_ utilization not _memory_ utilization. Note the excerpt
- from the man page:
-
- -s Displays the following information about the pages used for swap
- space:
-
- + The number of pages reserved, but not necessarily allo-
- cated, by the system for currently executing processes.
-
- + The number of pages used (physically allocated), including
- the number used for text images.
-
- + The number of pages free, wasted, or missing. Free pages
- are pages that have not been allocated. Missing pages are
- usually allocated to argdev. Wasted pages indicate the
- amount of space lost because the swap space is fragmented.
-
-
- Charlie
- --
- *****************************************************************************
- * Charles Richmond Integrated International Systems Corporation *
- * cmr@world.std.com (Temporary) cmr@koneko.shr.dec.com *
- * Specializing in UNIX, X, Image Processing, and Communications. *
-