DB2 Health Monitor-Monitor Heap Utilization

On a production system running DB29.5 on Red Hat Linux 4.6 .
If you want to keep the health monitor running, you can  increase
the size of MON_HEAP_SZ to about 2048. But I decided to turn the Health
Monitors Off, due to overconsumption of memory.
These are OLTP databases. Since I've turned off the health monitor the system is running smoothly

Problem
--------------------------------
DM10500E Health indicator "Monitor Heap Utilization"
 ("db2.mon_heap_util") breached the "upper" alarm
threshold of"95 %"
 with value "150%" on "instance" "db2instp".
Calculation:
 "((db2.mon_heap_cur_size/db2.mon_heap_max_size)*100);"
"((589824/
 393216) * 100)"= "150 %". History (Timestamp, Value,
Formula): "
 (16/11/200912:03:30.820296, 83, ((327680 / 393216) * 100))"

Resolution
--------------------------------

db2 update dbm cfg using HEALTH_MON OFF
db2stop and db2start to restart the instance.

 Ref:Jack Vamvas(http://www.dba-db2.com)