Though 5 years too late on this thread....
Airwave 8.2.9.1 you can view memory use via Devices then clicking on the AP in question. You can even generate a report or setup a trigger based on AP memory use.
Monitoring AP memory and CPU is useful, example we run into a bug on 8.3.0.3, where memory on controller based AP was too high. Basically clients getting disconnected, after several hours TAC found high memory on AP, so some sort of memory leak.