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- Path: sparky!uunet!haven.umd.edu!umd5!mregan
- From: mregan@astro.umd.edu (Michael Regan)
- Newsgroups: comp.unix.questions
- Subject: Tuning SUN OS IO buffer Sizes
- Message-ID: <15036@umd5.umd.edu>
- Date: 18 Aug 92 21:58:04 GMT
- Sender: news@umd5.umd.edu
- Organization: U. of Maryland @ College Park, Astronomy
- Lines: 11
-
- I have a qestion about tuning the Kernal in a SUN OS 4.1.2 system. The
- problem we are seeing is that the amount of real memory being used for caching
- IO seems to grow without limit until all other process are swapped out. From
- my reading I belive that in SUN OS 4.0 and in V.4 there is a kernal parameter
- BUFHWM that limits the amount of memory that can be used for IO buffers.
- The problem is I can not find any reference to BUFHWM in any SUN documention
- nor can I even find a reference to the buffer-cache which is the old way of
- doing it. Am I totally wrong and SUN OS 4.0 does not use BUFHWM or is it
- just not set in our kernal?
- Does anyone know for sure which method SUN OS 4.0 uses to cache IO?
- Thanks,
-