Difference between "autovacuum_naptime" and "autovacuum_vacuum_cost_delay"?

[Raghavendra Rao J S V <raghavendrajsv@xxxxxxxxx>]

Hi All,

I have gone through several documents but I am still have confusion related to "autovacuum_naptime" and "autovacuum_vacuum_cost_delay". Could you clarify me with an example.

When Auto vacuum worker process will start?

When Auto vacuum worker process will stop?

Does Auto vacuum worker process will sleep like Auto vacuum launcher process ?

What is the difference between Auto vacuum launcher process and Auto vacuum worker process?

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Regards,
Raghavendra Rao J S V