What is the puropose of the value of actionlib_status_frequency?

edit

Does anyone knows why the status topic publishes server's state machine messages at 5Hz? I had tested small and high values (up to 60s) and I couldn't notice any misbehavior on both sides (client/server). In my test I compared multiple frequency values for status topic when:

1. I send a goal,
2. then wait a bit and I send a second goal,
3. cancel all goals,
4. wait a bit and send a third goal and
5. wait for result

What would be the effect of setting the actionlib_status_frequency to 1hr?