Digital BW, The Print

Bill,

Had to check the manual to find that readout. The number never seems to
change during an action but will revise itself after the action is finished
sometimes. With a 1.6GB file open it reads 28%. After doing a lasso action
it goes up to 30% and after feathering the selection it goes up to 71%. At
the same time the RAM usage is falling from 1.4GB to 500MB. Doing a mode
change brings the Efficiency up to 100% and the RAM usage up to 1.3MB but
there is intense drive action going on and CPU usage is down below 10% at
the end of the mode change Efficiency reads 40%.

Working with a 560MB file Eff. stays at 100% during an Unsharp Mask action
but at the end drops to 71%. Memory usage climes from 700MB to 1.3GB. A mode
change drops Eff to 35% and memory usage stays constant.

 PS and Wind 2000 memory management just don't seem to talk to each other
very well and I suspect that the Efficiency values may not mean anything.

I should do some research on maximizing Win 2000's memory management.

Martin Wesley

http://www.borderless-photos.de/guests.html



----- Original Message -----
From: "Bill Morse" <willym@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Friday, September 20, 2002 1:03 PM
Subject: Re: [Digital BW] Photoshop efficiency


> Martin, what does PS say in the "Efficiency" box, when you are
experiencing
> this slowdown?
>
> Bill
>
> on 9/20/02 1:36 PM, Martin Wesley wrote:
>
> > ----- Original Message -----
> > From: "Bill Morse" <willym@...>
> > To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> > Sent: Friday, September 20, 2002 9:38 AM
> > Subject: [Digital BW] Photoshop efficiency- was: Re: 4x5 Neg Scan
Resolution
> >
> >
> >> Hi Martin-
> >>
> >> That does not really conform with my experience with PS- albeit on a
> > Mac...
> >> (but let's not go there! ;^)
> >
> > Bill,
> >
> > We certainly don't need a platform war! <G>
> >>
> >> With the operations that you feel are slowing down, what does the
> >> "efficiency" box tell you is going on?  The scratch disk utilization
> > numbers
> >> are only numbers- they don't directly tell you whether PS is slowing
down
> > or
> >> not.
> >
> > The slow down is that the scratch disk is being used too much rather
than
> > RAM. Obviously if I have 1.5GB of RAM and a 1.6GB file there is no
choice.
> > Even with a 500MB the 1.5GB of RAM is less than Adobe's RAM
recommendation
> > of 5 to 7 times file size.
> >>
> >> If the efficiency goes down, then there is a problem, presumably with
your
> >> Windows memory settings.
> >
> > The problem is that Adobe does not appear to adhere to Window memory
> > management conventions. Have done some trials setting up multiple
Pagefiles
> > in Windows providing up to 8GB of virtual memory on top of the physical
RAM
> > and PS simply ignores it sending stuff off to the scratch disk for no
good
> > reason. PS appears to be unaware of how much memory Windows is making
> > available to it.
> >>
> >> On a Mac, PS can't use more than 1 Gig anyway, so I use 350 MB of ram
as a
> >> ram scratch disk; makes a big difference with 500 MB files.
> >
> > I can get PS to use up to 1.5GB under Windows but only if 5 times the
file
> > size or ~300MB fits within that. When I open a file PS takes over RAM
> > roughly equal to 5 times the file size just to start. Beyond 250 to
300MB PS
> > will momentarily use all of the available memory and than it is off to
the
> > scratch disk with the data and PS is using less memory with the larger
file
> > than the smaller one. It appears to like to use a maximum of about 1GB
even
> > though more is available. While there is not a strict limit, it seems to
> > mimic the 1GB Mac limitation.   The RAM disk is an excellent idea
however
> > and makes the new PC mother boards that will take up to 3GB or 4GB of
RAM
> > more interesting. 1.5GB for PS and a 2GB RAM Scratch disk might be a
real
> > screamer. I will try creating a 500MB RAM disk as the primary scratch
disk
> > leaving PS with 800 to 900MB of RAM and see what I get.
> >
> > Thanks,
> > Martin
> >
> >>
> >> on 9/20/02 11:25 AM, Martin Wesley wrote:
> >>
> >>> One of the problems is that PS seems to basically have an antiquated
> > memory
> >>> management system that does not mesh well with OS memory management.
> > Even
> >>> with 1.5+GB of RAM PS will preferentially spool data out of memory to
> > disk.
> >>> It is not uncommon to open a large file and have it all go into RAM
but
> > at
> >>> the first action PS spools it to disk and only uses a fraction of
> > available
> >>> RAM.
> >>
> >>
> >>
> >> Please visit the Group Homepage to check the Files, Bookmarks, Polls
and
> > other resources as they are often being updated. The page is at:
> >>
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