The maximum for bgwriter_delay is currently 10 seconds. That's a long time, and in fact if you set it to a value greater than 1 s, the sleep is split into 1 s intervals with a call to AbsorbFsyncRequests in between them.

Is there a use case for a setting > 1 s? We could simplify that logic a little bit if we just set the maximum at 1 s.

  Heikki Linnakangas

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