32 bit apps on 64 bit OS

On a 64 bit OS with a lot more that 4gb of RAM, will
different memory hungry 32-bit apps get different chunks
of memory to work with, or are they all competing for the
same memory?

I know the answer in Unix, with free and malloc, and their
cousins, hopefully it is the same in Linux.

For example, if I even need to run the 32-bit version of photoshop,
can I tell it to absolutely max out its memory and not hurt other
32-bit programs?



--
Andrew Hall
(Now reading Usenet in alt.sys.pc-clone.dell...)

wrote in message
...

On a 64 bit OS with a lot more that 4gb of RAM, will
different memory hungry 32-bit apps get different chunks
of memory to work with, or are they all competing for the
same memory?

I know the answer in Unix, with free and malloc, and their
cousins, hopefully it is the same in Linux.

For example, if I even need to run the 32-bit version of photoshop,
can I tell it to absolutely max out its memory and not hurt other
32-bit programs?

32 bit apps will benefit from the additional RAM because they won't be
battling each other for it. Even though they're limited to 2 gigs each, if
you have 8 gigs you can run multiple apps.

But Photoshop has a 64 bit version as well as a 32 bit version. Unless you
use plugins that haven't been written for 64 bit yet, no real reason to
stick to 32 bit version.

Bob

On Fri, 15 Oct 2010 19:26:40 -0400, wrote:


On a 64 bit OS with a lot more that 4gb of RAM, will
different memory hungry 32-bit apps get different chunks
of memory to work with, or are they all competing for the
same memory?

I know the answer in Unix, with free and malloc, and their
cousins, hopefully it is the same in Linux.

For example, if I even need to run the 32-bit version of photoshop,
can I tell it to absolutely max out its memory and not hurt other
32-bit programs?


Not sure if Bob Levine is 100% correct (maybe) but he's correct in the
basic premise, more ram is better. In other words, if one had plenty
of memory (say unlimited for this discussion), programs would not
compete for the same memory (memory block) but in pc's with not enough
memory, they might depending on their demands.

I can't speak for photoshop but some programs have ram settings or the
like (low / high use of resources) but to be honest, I don't see it
in many.

"Bob Levine" writes:

wrote in message
...

On a 64 bit OS with a lot more that 4gb of RAM, will
different memory hungry 32-bit apps get different chunks
of memory to work with, or are they all competing for the
same memory?

I know the answer in Unix, with free and malloc, and their
cousins, hopefully it is the same in Linux.

For example, if I even need to run the 32-bit version of photoshop,
can I tell it to absolutely max out its memory and not hurt other
32-bit programs?

32 bit apps will benefit from the additional RAM because they won't be
battling each other for it. Even though they're limited to 2 gigs
each, if you have 8 gigs you can run multiple apps.


Great, so they all use their own block of memory.

But Photoshop has a 64 bit version as well as a 32 bit version. Unless
you use plugins that haven't been written for 64 bit yet, no real
reason to stick to 32 bit version.


Yes, I know. I meant to write "ever" not "even" above.
I do not know if I have any 32 bit dependencies in my
PS workflow.
Bob


--
Andrew Hall
(Now reading Usenet in alt.sys.pc-clone.dell...)