Application errors are like the galactic particles that are bound to drain the memory of an application like nano black holes..., Beware of it...

Mostly the discussions on internet focus on variables and the objects that consume heap memory

1 missed point is about the application errors, numerous the number of errors greater the heap memory consumption 

Not only this, the speed of draining increases exponentially as the number of application errors increase 

Note these are nano black holes and when they merge, application crashes with no reason

This is a pragmatic experience and so allocate a heap memory to start with and regularly increase it, tune it to perform