Don't adjust WakeUpTime if there's no pool to run the process in
Don't adjust WakeUpTime if there's no pool to run the process in

If one or more pools was constantly starving, the previous coding would
busyloop.  Fix by ignoring such processes with regard to WakeUpTime.
When the query finishes, the select will still wake up and fire another
process in the same pool immediately.

trustly/pgcronjob