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+--- Thread: Photoshop and RAM... (/showthread.php?tid=44721)
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Photoshop and RAM... - bazookaman - 12-04-2007
I just noticed that PS seems to only "see" 3072 mb of my ram. Is that normal? And if so, can I set it to 100% given the fact that i actually have 9gb of ram? Will it cause undo funkiness if PS thinks its using all my ram?
Re: Photoshop and RAM... - MacArtist - 12-04-2007
You won't be able to take advantage of that much RAM until they write a 64 bit version of Photoshop.
Re: Photoshop and RAM... - papercup - 12-04-2007
Photoshop is a 32-bit app, and 3 gigs for scratch is all it can use. It can address 4 gigs, the rest is for overhead.
Maybe CS4.
Re: Photoshop and RAM... - bazookaman - 12-04-2007
ok. So thats the why. But is there any advantage to setting it to the 3072 max? It says the "Ideal Range" is 1689-2211.
Re: Photoshop and RAM... - MacMagus - 12-04-2007
What version of PS? Where did you see that number reported? Does it include the disk cache?
CS can use up to 2GB of real RAM.
http://kb.adobe.com/selfservice/viewContent.do?externalId=322829
CS2 can use a maximum of either 2 or 3GB of real RAM:
http://kb.adobe.com/selfservice/viewContent.do?externalId=320005
CS3 can use up to 3.5GB of real RAM.
http://kb.adobe.com/selfservice/viewContent.do?externalId=kb402029
Re: Photoshop and RAM... - bazookaman - 12-04-2007
Currently running 10.0.1. Number reported is in the prefs...
Re: Photoshop and RAM... - laarree - 12-04-2007
From http://kb.adobe.com/selfservice/viewContent.do?externalId=kb401089&sliceId=1
"Allocating Memory above 2 GB with 64-bit Processors
When you run Photoshop CS3 on a 64-bit operating system, such as Mac OS X v10.4 and later, Photoshop can access up to 8 GB of RAM. You can see the actual amount of RAM Photoshop can use in the Let Photoshop Use number when you set the Let Photoshop Use slider in the Performance preference to 100%. The RAM above the 100% used by Photoshop, which is from approximately 3 GB to 3.7 GB, can be used directly by Photoshop plug-ins (some plug-ins need large chunks of contiguous RAM), filters, and actions. If you have more than 4 GB (to 8 GB), the RAM above 4 GB is used by the operating system as a cache for the Photoshop scratch disk data. Data that previously was written directly to the hard disk by Photoshop is now cached in this high RAM before being written to the hard disk by the operating system. If you are working with files large enough to take advantage of these extra 2 GB of RAM, the RAM cache can increase performance of Photoshop.
The default RAM allocation setting in Photoshop CS3 is 70%. These settings should be optimal for most users. To get the ideal RAM allocation setting for your system, change the RAM allocation in 5% increments and watch the performance of Photoshop in the Activity Monitor. You must quit and restart Photoshop after each change to see the change take effect.
The available RAM shown in the Performance preferences has already deducted an amount that is reserved for the operating system from the total RAM in your computer. You shouldn't set the percentage of RAM to be used by Photoshop to 100% (unless you are using more than 2G of RAM) because other applications which run at the same time as Photoshop (for example, Adobe Bridge CS3) need a share of the available RAM. Some applications use more RAM than you might expect. For example, web browsers can use 20-30 MB of RAM, and music players can use 20-50 MB of RAM. Watch the Activity Monitor to view the RAM allocations on your computer.
Watch your efficiency indicator while you work in Photoshop to determine the amount of RAM you'll need to keep your images in RAM. The efficiency indicator is available from the pop-up menu on the status bar of your image or from the Palette Options on the Info Palette pop-up menu. When the efficiency indicator goes below 95-100%, you are using the scratch disk. If the efficiency is around 60%, you'll see a large performance increase by changing your RAM allocation or adding RAM."
Re: Photoshop and RAM... - tahoedrew - 12-04-2007
[quote bazookaman]Currently running 10.0.1. Number reported is in the prefs...
I'm going to assume you meant 10.5.1. I didn't think you could install 10.0.anything on a Mac Pro, and why would you?!
~A
Re: Photoshop and RAM... - bazookaman - 12-04-2007
Photoshop 10.0.1
Re: Photoshop and RAM... - Mr645 - 12-06-2007
Keep in mind that Bride is another ram hog. I also see that your using 6 cache levels. Cache levels are used to give accurate previews of files at different sizes. Such as 66.7%, 33%, 12.5% viewing. If you can deal with lower quality previews on the screen when at other then 100% viewing, you can boost performance by lowering the cache levels.