> Adobe after effects utilizes only 6% RAM during renders
How are you determining this?
> Could any body suggest how to increase RAM utilization in Adobe AE 10.0 renders
See this page for information about memory and improving performance in After Effects: http://adobe.ly/dC0MdR
After Effects builds a frame at a time with the elements that are in that frame. Particle generators take more memory, but an HD Video Frame is only so big. You can't force the app to use more memory than is required for the frame that is being processed. CPU usage is another thing to consider. The more number crunching there is to be done the more cpu power is required. Some rendering operations don't require a lot of CPU power so not much is used. Then there's multi-processing. Only a hand full of plug-ins from third party developers are MP aware so you don't get that much help there.
Here's another thing to consider. The ram usage reported by AE is only the ram that is being utilized to process that frame. If you use up 100% of the ram rendering what is going to be left to store frames for playback?
The key to faster renders is to maximimize the data path to write the data and to minimize the unused data caused by scaling huge assets down to fit into a video frame. Until the basic way a video frame is digested and processed in AE you are not going to see full usage of all of your machine assets while processing video.
whenever a render starts, it shows the % of RAM being used by AE
> whenever a render starts, it shows the % of RAM being used by AE
That is just the amount of RAM used by the foreground process, not the background rendering processes. That is not a useful measure of how much RAM is actually being used. You need to actually look at the Activity Monitor or Task Manager.