> I have two programs that communicate via a pseudo message file and the
> file's length is always small compared to total memory on the 
> system.  Is
> there a way to convince the memory manager to keep the file 
> in memory ?

I see you've already gotten the "do you really want to do this?"
lecture, so I'll skip the sermonette. Another option, if you're
convinced you have a legitimate need for high-performance inter-process
data exchange: there are AIFs that let you allocate, write, and read
*small* shared memory blocks. All the usual caveats of PM
close-to-the-OS programming apply; i.e. if you screw something up, you
get to walk down to the computer room and type "TC" on the console.

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