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From: aland@infmx.UUCP (Dr. Scump)
Newsgroups: comp.databases
Subject: Re: Extended Memory Errors installing PC Oracle 5.1A
Summary: check to make sure extended memory is addressable
Message-ID: <1193@infmx.UUCP>
Date: 23 Mar 89 04:21:47 GMT
References: <2057SMYGC@CUNYVM>
Organization: Informix Software Inc., Menlo Park, CA.
Lines: 44

In article <2057SMYGC@CUNYVM>, SMYGC@CUNYVM.CUNY.EDU (Steve Yoman) writes:
> We have been trying in the last few days to install PC Oracle on an
> IBM PS/2 Model 70 (DOS 4.0).  The machine is configured with 3M of RAM,
> but the machine locks up during installation.  After playing around a bit we
> were able to get a "Kernel Log" of the error - Error: Insufficient memory;
> 896K of extended memory required.
> 
> We're wondering if anyone else has had this experience and could lend some
> advice.  Oracle Corp. says there should be know problem, and would love to
> help for a price.
> The suspicion here is a bug in DOS 4.0.
> 
> Steve Yoman

I haven't heard of any differences in *extended* (as opposed to 
*expanded*) memory addressing in DOS 4.0.  I would check to make sure
that your 2+ MB of extended memory is in fact recognized by DOS.
There are a number of utilities out there to check how much extended
memory is available (plus the PS/2s are pretty friendly to configure).
Make sure that you are defining extended memory, not expanded memory.
The brute force method would be to try to create a 2 MB extended
memory VDISK (use the /E switch) -- if that works, then your machine
is probably behaving itself.

Another thing to watch for is if you are using any 386 environments
(DESQview, 386-to-the-Max, etc.).  They use Virtual 8086 mode and can
conflict with products which use 80286 protected mode like Oracle
and Informix.  A new convention for 386 DOS environments, called VCPI
(Virtual Control Program Interface), should help to limit such problems
in the future.  

(BTW, if there are any Informix protected-mode users out there affected 
by this, we have a patch that provides support for VCPI-compliant 
environments in the .06 products.  The upcoming .06C versions include 
VCPI compliance as well.)

Hope this helps.
--
    Alan S. Denney  @  Informix Software, Inc.    
         {pyramid|uunet}!infmx!aland                 "I want to live!
   --------------------------------------------       as an honest man,
    Disclaimer:  These opinions are mine alone.       to get all I deserve
    If I am caught or killed, the secretary           and to give all I can."
    will disavow any knowledge of my actions.             - S. Vega