RE: W2K RAMlimits

["Laurie Solomon" <laurie@advancenet.net>]

Jim,
If you are directing it to me; I have to admit that I do not have the
technical knowledge to answer you either theoretically or empirically.  On a
logical level, I suppose so; but since Photoshop typically requires 3x5
times the amount of storage for any given image, you would need at minimum
1.5 GB of actual Physical RAM just to house the image related files for each
550MB image you have opened and are working on plus any overhead memory that
Photoshop would need for its own operation and any overhead memory that the
operating system would need for itself (and that is assuming that you have
no othe applications runining in bacxkground or elsewhere on the system).

However, I do remember a discussion just a little while ago on either this
list or another list which noted some of the practical problems that one
would encounter using a RAM disk that would in effect cancel out any
efficiencies such a disk might have and even cause other problems that would
slow down the processing of data; but I do not remmeber what they were.  The
discussion may have been on the Photoshop list.

-----Original Message-----
From: owner-epson-inkjet@leben.com
[mailto:owner-epson-inkjet@leben.com]On Behalf Of Jim Wingo
Sent: Friday, June 14, 2002 7:04 AM
To: epson-inkjet@leben.com
Subject: RE: W2K RAMlimits


In the vein of pure speculation: might it be possible, if one had literally
gigs of RAM, to set up a RAM disk to be used as the PS scratch disk? Would
this not be the equivalent to working intirely in RAM on large files?

Jim Wingo

*********** REPLY SEPARATOR  ***********

On 6/13/2002 at 8:36 PM Laurie Solomon wrote:

>>it means you can work on those 550Mb medium format scans without endless
disk  writes
>
>If you are using Photoshop, I doubt it since Photoshop still relies on
>virtual memory from scratch disks requiring disk writes and reads no
matter
>how much actual physical RAM you have on the system.  It keeps multiple
>copies of the file in its various versions on the scratch disk not RAM for
>multiple undos, for the history palette, and for the revert function for
>starters. It is only possibily the actual working desktop appearing copy
>that it keeps in actual physical RAM.



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