How to determine where memory consumption is occurring?

What command or third party utility can I use that will sort memory
consumption of topic/queue/connections by the ones using the most memory?

I am running out of memory on the broker but I cannot find out what
connection or queue/topic is causing it. I need a better way to
troubleshoot. There are thousands of items (connections, queues, etc) and
as far as I know, using a simple tool such a jconsole does not really have
any sorting capability to drill down to find what I need.

Thanks