On 12/8/05, Jon Block <[EMAIL PROTECTED]> wrote:
> I have a super load intensive app that I'm working on. I'm using tons of
> cached queries and other types of CFC's etc. My server has 2GB of memory
> on it. I want CF to be able to gobble up all the memory it possibly
> would need to accomplish all of the stuff I've got it doing. Do I need
> to specify somewhere that it can use up to 2GB or memory??
>

Jon,

Well, yes, but be extremely careful. Here are some notes:

1) If you have 2 GB total on the box, then you *can't* dedicate 2GB
solely for ColdFusion. Other applications (like the OS) need their own
RAM allocations. JVMs use continuous memory spaces, which means that
it will need 2GB of *continuous* space in RAM to work. If there's
isn't 2 full GB of RAM available, it'll use 2GB of swap space instead
(if there's even enough), and will kill your performance.

2) You don't note the OS you're using. If it's Windows, there is a
limit to the amount of RAM that can be allocated to a JVM Heap (I
think it's 1.4 GB) due to a continuous memory address limitation on
that platform.

3) You will need to create a separate jvm.config file, which
ColdFusion uses as its "template" to determine how much memory, etc.,
to allocate.

I would suggest searching around for performance tuning articles to
help you out, as this is a very complicated area. Here's one to get
you started:

http://www.robisen.com/index.cfm?mode=entry&entry=FD4BE2FC-55DC-F2B1-FED0717CC1C7E0AF

Also, anything on Steven Erat's blog is invaluable as well:

http://www.talkingtree.com/blog/

Regards,
Dave.

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