Memory consumption per bpel process

Question

Is there any way to monitor the memory consumed by each bpel process instance when it is running and also how much each components of this instance consumes.
We know about the top utility but it shows only the memory allocated to the opmn process and not by the individual bpel process. Also the threads page in the manage bpel domain also gives only the overall memory used by the opmn process and not a bpel instance by instance consumption. And sometimes even when no requests/instances are running this is showing a very high value to the tune of 400Mb.
So to summarize how to monitor the memory consumed by each bpel instance and also by each of the components in that instance.

Answer 1

I think i was not clear earlier...we want to find out how much of the memory is being consumed by our process alone excluding the opmn system processes.We want to do this
because for huge payloads of the tune of 3Mb the system throws a out of memory java heap space exception. Increasing the heap space to 2Gb (earlier 1.5gb) solves the problem but we want to find out why so much memory is being consumed and what we can do to reduce this consumption.
We have done the normal tweakings like reducing audit levels,logging levels,reduce no of threads in the system and use of xdk transformations but they seem to be of little help.
Btwn our process uses a apps adapter would the transformations of xml to db objects use this memory?
Thanks,
Praveen.