On 2015-09-19 01:47, David Taylor wrote:
On 19/09/2015 06:24, Savageduck wrote:
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On my Mac I have 16GB, of that I have 9.8GB allocated to PS, I currently
have 4 layers of a 4288 x 2412 @360 tiff open. The memory usage is
4.53GB. There is still some headroom.
In Lightroom I have left the RAW cache setting at 1GB, and LR is open
and using a massive 450.3MB.
I have also been experimenting with Affinity Photo, and that is open
with a NEF and three layers, and it is using 806.9MB.
The Creative Cloud is using 1.03GB (I don't know why)
Adobe Desktop Services is using 977.9MB.(I don't know why)
My web browser is using up 1.61GB. (I have lots of tabs open)
My Mail app is using 241.2MB.
This Usenet Client is using 167.4MB
My Wacom driver is eating up 24.4MB

The system refuses to give up the 2.24GB it is using.
There is some other stuff running is using 1.8GB.

So of the 16 GB installed, and with heavy multi-task, multi-app usage I
am currently using 13.8GB. If I need to free up some of that RAM there
are a few apps I can quit to give PS that 9.8GB I have assigned it.

I could also go to 24GB or 32GB, but for now I am managing with 16GB.

Wow! I hadn't realised just how profligate with memory (as well as with
money) those Adobe programs are! The Apple software too. Fortunately,
I am spared those problems as much simpler (and lower cost) programs
completely satisfy my photographic organisation and processing needs. It
seems wrong to me that a program needs memory pre-allocated.

Don't be too smug. My SO operated OS X (Mavericks) on 2 GB and could
load and run her e-mail client, PS CS5, browser and various utility apps
all at once.

The OS will ALWAYS use as much memory as is reasonably available - apps
also use memory until they're forced to dispose of it or until the OS
begins swapping.

In sum, you can't compare the memory stats on a 8 GB computer with those
of a 16 GB computer. Too many variables about how each OS and each app
uses and disposes of memory.