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- From: sip1@ellis.uchicago.edu (Timothy F. Sipples)
- Subject: Re: Using memory above 8MB as page-cache
- Message-ID: <1992Aug18.215828.23048@midway.uchicago.edu>
- Keywords: help
- Sender: news@uchinews.uchicago.edu (News System)
- Reply-To: sip1@midway.uchicago.edu
- Organization: Dept. of Econ., Univ. of Chicago
- References: <15000@umd5.umd.edu>
- Date: Tue, 18 Aug 1992 21:58:28 GMT
- Lines: 27
-
- In article <15000@umd5.umd.edu> ralph@umsa8.umd.edu (Ralph Roland) writes:
- >I have a 33Mhz '486 machine with 8Meg of "0 wait-state" RAM on
- >the motherboard, and have just acquired a couple of Intel AboveBoard
- >memory cards (6Meg worth). If these boards are added to the system
- >and configured to supply the address range 8M-14M, everything seems
- >to work as I expect. The first 8Meg of ram is fast, the rest is *SLOW*
- >(of course this ram is on the ISA bus, and is slow (150ns) to begin
- >with, so this is exactly what I expected to happen). If OS/2 is
- >allowed to use this memory everything crawls to a standstill, with
- >windows taking several seconds just to 'explode' open or closed.
- >It appears OS/2 is allocating the higher memory first, and the kernal
- >is getting mapped into the slow memory...oh well.
-
- OS/2 2.0 is supposed to sense whether RAM is "slow" or "fast" and give
- the nod to the faster memory. Evidently it isn't quite doing that in
- your case.
-
- You might try increasing your disk caches so that they "fill up" the
- expansion slot memory. Better bet, though, is to sell the expansion
- boards and use the proceeds to add RAM to your motherboard -- you
- might come close to breaking even.
-
- --
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