I have listed the memory usage for a particular application connected to the database using db2 get snapshot for all on dbname

Memory usage for application:

Database partition number = 0
Agent process/thread ID = 55482
Memory Pool Type = Application Heap
Current size (bytes) = 425984
High water mark (bytes) = 491520
Maximum size allowed (bytes) = 753664

Is this is correct memory usage..? Or I have to fine tune the memory parameters..?

Version: Fixpack 5 and OS : IBM AIx