I'm still concerned about how the critical situation is handled. Your
patch just prints a warning to the log and then goes on -- doing what?
The warning rolls off the log, and then you have no idea what happened,
or how to recover.
I would like a flag in pg_replication_slots, and possibly also a
numerical column that indicates how far away from the critical point
each slot is. That would be great for a monitoring system.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
