Using RAM

OU
Posted By
Olaf_Ulrich
Aug 22, 2006
Views
173
Replies
2
Status
Closed
On my Windows PC (XP SP2) with 1 GB of RAM, I have set Photoshop’s Memory Usage to the default value of 55 %. But … what does this mean exactly? Will Photoshop claim 55 % of 1 GB? Or 55 % of the free RAM at Photoshop start-up time? Or 55 % of free RAM at any given point in time? 55 % exactly or up to 55 % as needed?

What I’d like to know in particular: Does it make a difference whether I start Bridge first, then select and open an image which in turn will launch Photoshop … or whether I start Photoshop first and then launch Bridge from there?

Will Photoshop have access to more memory in the second case? My thinking goes like this: In the first case Bridge will claim some memory, and then Photoshop will use 55 % of what’s left. In the second case, Photoshop will take 55 % of the whole memory (minus whatever amount the OS has claimed), and Bridge has to squeeze into whatever is left. Is this correct? If not then please educate me! What’s the best strategy to launch Bridge and Photoshop when I what to run both at the same time?

— Olaf

MacBook Pro 16” Mockups 🔥

– in 4 materials (clay versions included)

– 12 scenes

– 48 MacBook Pro 16″ mockups

– 6000 x 4500 px

C
chrisjbirchall
Aug 22, 2006
It really makes little difference whether you launch Bridge first or Photoshop. I have mine set to automatically launch Bridge at the same time as PS so both apps are active all the time.

On a machine with 2GB of RAM, 55% allocated to PS is about right, leaving enough for the Bridge and any other apps to run in, without causing the OS to page out to virtual memory.

Make sure you have a good sized (several GBs) scratch disk, preferably on a different physical disk to the OS.

Think of "Scratch" as Photoshop’s "memory", with the Physical RAM acting as a cache for it.

This page <http://www.adobe.com/support/techdocs/320005.html> will explain Photoshop’s unique way of handling memory.

Hope this helps.

Chris.
L
LenHewitt
Aug 22, 2006
Olaf,

With a setting of 55% it will use up to 55% of the available RAM at Windows Startup, not Photoshop Startup

MacBook Pro 16” Mockups 🔥

– in 4 materials (clay versions included)

– 12 scenes

– 48 MacBook Pro 16″ mockups

– 6000 x 4500 px

Related Discussion Topics

Nice and short text about related topics in discussion sections