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- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!haven.umd.edu!umd5!oberon.umd.edu!matthews
- From: matthews@oberon.umd.edu (Mike Matthews)
- Newsgroups: comp.sys.next.misc
- Subject: Re: How to set nbuf=64 as default?
- Message-ID: <16937@umd5.umd.edu>
- Date: 12 Nov 92 02:12:46 GMT
- References: <22OCT199214011322@mpx2.lampf.lanl.gov> <1992Nov5.063618.11901@pilhuhn.ka.sub.org> <1992Nov7.111402.3490@cubetech.com>
- Sender: news@umd5.umd.edu
- Organization: /etc/organization
- Lines: 27
-
- In article <1992Nov7.111402.3490@cubetech.com> andrew@cubetech.com writes:
- >Do NOT put in a vaule greater than 255. Values greater than 255 can
- >cause you system to panic!
-
- Really? Wow... I had 300 buffers running for about two hours, until it
- became painfully obvious that...
-
- ...having too many buffers can cause periods of intense disk activity which
- can very well slow the system down. Kinda like traffic jams; when there's an
- accident, there is a definite, physical delay (like writing out a buffer),
- but the delay continues long after to get everything cleared out.
-
- If you've got 256 buffers, that's 2 megabytes of stuff to dump to disk.
-
- Annd, if you do crash or panic (come to think of it, I can't remember if I
- panic'd or not, but I did have an abormal shutdown), those 2 megabytes of
- stuff probably weren't written to disk...
-
- >andrew
- ------
- Mike Matthews, matthews@oberon.umd.edu (NeXTmail accepted)
- ------
- Even if you can deceive people about a product through misleading statements,
- sooner or later the product will speak for itself.
- - Hajime Karatsu
-
-
-