qdstat -m shows managed memory usage but it does not show qdrouterd process memory usage. An improvement would be to display process memory usage somewhere via qdstat.
Often a memory leak (
DISPATCH-1407) will be in objects not held in managed memory. In these cases memory usage may grow unbounded but not be visible by qdstat.
A new line or three could be added to qdstat -g or a new switch could be added to qdstat. Good values to show are the standard columns from top: VIRT, RES, and SHR.