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After Effects RAM and render

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Eric RobinsonAfter Effects RAM and render
by on Dec 9, 2009 at 6:37:28 pm

I have a lot of RAM and I am using CS4. I noticed when rendering, AE says using 30% or whatever of 3.0 GB. AE can use more ram as I have much more available and I have it set up in memory for it to do so. Is this just for RAM preview and work and not rendering? Is there something I am missing?


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Dave LaRondeRe: After Effects RAM and render
by on Dec 9, 2009 at 10:41:59 pm

[Eric Robinson] "I have a lot of RAM... AE says using 30% or whatever of 3.0 GB. "

You only have 3GB on your machine? Sorry, but in AE-Land, that isn't a whole lot of ram AT ALL. Not if you want to use multiprocessing, which can use up to 4GB Per Core. Do the arithmetic for your machine.

As for using only 30%, well, your comp may not have been very complicated, and AE was using all the RAM it needed.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Eric RobinsonRe: After Effects RAM and render
by on Dec 10, 2009 at 1:48:08 am

No, I have 12 gb in my computer, but AE says "30% of 3 GB" when it is rendering. I have no idea why this is.


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Todd KoprivaRe: After Effects RAM and render
by on Dec 10, 2009 at 4:38:46 pm

That message that you get on startup is misleading to the point of being useless. There's really no value at all in knowing how much RAM After Effects is using to start up.

Regarding the 3GB part: After Effects CS4 is a 32-bit application, so the theoretical maximum that it can use (per process) is 4GB. The operating system actually hogs some of that, so After Effects really gets a maximum of 3GB allocated to the foreground process. There's a lot more detail in this section, including the comments at the bottom of each page.

If you use Render Multiple Frames Simultaneously multiprocessing on a 64-bit operating system, then After Effects will start additional instances of itself that each get to use a few GB to render frames in parallel. So, your 12GB won't go to waste.

BTW, the 4GB per process limitation of 32-bit applications is why you should be happy about this: "Future versions of After Effects will be 64-bit"

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Todd Kopriva, Adobe Systems Incorporated
putting the 'T' back in 'RTFM' : After Effects Help on the Web
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If a page of After Effects Help answers your question, please consider rating it. If you have a tip, technique, or link to share---or if there is something that you'd like to see added or improved---please leave a comment.


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Eric RobinsonRe: After Effects RAM and render
by on Dec 10, 2009 at 4:51:16 pm

Thanks!

So, what you are saying is that percentage of GB being used when rendering is not accurate?

I never was concerned about the message at startup, but I understand what you are saying and why you mentioned it.


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