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Reply To: | VANCE,JEFF (HP-Cupertino,ex1) |
Date: | Fri, 3 Mar 2000 12:35:27 -0800 |
Content-Type: | text/plain |
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Hi,
(I've cc'd Craig as the authority on this subject)
...
> > Yes, MPE now deals with 4096 byte pages in and out of
> > memory. Obviously, the more you can get in each 4096 disk read,
> > the better. When you make files for efficiency, set the blocking
> > factor to 4096 / record size of the file in bytes rounded down to
> >get the best....
> Thanks!
>
> If the above is true, then what's the chance that CSY could
> update their routine so that the default blocking factor uses the
> above logic? Of whom should I this question? Jeff? Donna (or one
> of the other SIG leaders)?
>
> Ted
From what I know the blocking factor does not matter for disk files
because MPE reads and pre-fetches their contents into memory and then
just moves bytes from a memory buffer to your stack. However I seem
to recall some cases where it may matter, but I am sorry to say I
have forgotten the details.
Jeff Vance, CSY
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