If you have “hardware monitoring” enabled (the default), your logging hours equal the entire duration of your runs.
If you choose to turn off “hardware monitoring”, you only pay for the amount of time your runs actually log metadata into Neptune’s database. In this case, your total logging hours equal the cumulative length of all the logging sessions over the course of your run.
Here’s how that works:
If < 10 minutes pass between your 1st and 2nd log, the time between the 2 logs gets recorded as one continuous logging session, and gets added to your billable hours.
Billable time: 8 mins
And then if the 3rd logging event occurs within 10 minutes of the 2nd log, your logging session gets extended, and the time between the 2nd and 3rd logs gets added to your billable hours. And the same for the 4th log, and so on…
Billable time: 18 mins
But, if there’s more than a 10-minute gap before and after a logging event, only 1 second of logging time gets added to your bill for that log.
Billable time: 2 seconds
So without hardware monitoring enabled, you only pay for the time you log metadata, not the entire run duration.