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- Newsgroups: comp.unix.ultrix
- Path: sparky!uunet!decwrl!pa.dec.com!engage.pko.dec.com!nntpd.lkg.dec.com!nntpd2.cxo.dec.com!nabeth!alan
- From: alan@nabeth.enet.dec.com (Alan Rollow - Alan's Home for Wayward Tumbleweeds.)
- Subject: Re: DEC 2100 - memory config help please...
- Message-ID: <1992Sep15.181949.9429@nntpd2.cxo.dec.com>
- Lines: 38
- Sender: alan@nabeth (Alan Rollow - Alan's Home for Wayward Tumbleweeds.)
- Reply-To: alan@nabeth.enet.dec.com (Alan Rollow - Alan's Home for Wayward Tumbleweeds.)
- Organization: Digital Equipment Corporation
- References: <1992Sep14.150930.6781@trentu.ca> <1992Sep14.172723.14101@fs7.ece.cmu.edu> <1992Sep14.194517.12300@nntpd2.cxo.dec.com>
- Date: Tue, 15 Sep 1992 18:19:49 GMT
-
-
- In article <1992Sep14.194517.12300@nntpd2.cxo.dec.com>, alan@nabeth.enet.dec.com (Alan Rollow - Alan's Home for Wayward Tumbleweeds.) writes:
-
- > [ The rather mysterious combination of words... ]
- >
- > "larger tapes used by the kernel"
-
- Where I actually meant to say "larger tables used by the kernel".
-
- To illustrate and actually say something useful...
-
- % pstat -T
- 167/ 609 files
- 138/ 444 gnodes
- 50/ 288 processes
- 36/ 40/ 76 active/reclaimable/total texts
- 136/1843 00k swap
-
- The tables of interest here are the file table (struct file),
- the gnode table (struct gnode), the process table (struct proc)
- and the text table (struct text). It so happens that the sizes
- of these data structure are:
-
- File: 56
- Gnode: 228
- Proc: 312
- Text: 48
-
- The result of the math is that these tables use 228,840 bytes
- of kernel space. Not very much compared to some systems that
- are expected to support hundreds of users, but still an interesting
- part of the 3-4 MB used by the loaded kernel.
-
- Note: Example used here was taken from a DECstation 5000/200
- running ULTRIX V4.2.
- --
- Alan Rollow alan@nabeth.cxo.dec.com
-
-