Digital BW, The Print

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.
>> 
>> 
>> 
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