Commits on Apr 25, 2018

1. Add more options for xmins and nextxids …

   This adds two more options for additional metadata into the slot:
   
   - `include-xmins` This data includes the `catalog_xmin` and `xmin` fields
   from the replication slot. The reasons for wanting this generally occurs when
   using logical replication with a secondary. Since replication slots don't
   get replicated to secondaries, in the event of the failover you need
   some mechanism for seeing what records you may have missed. The
   xmin/catalog_xmin is useful as you can use it for a lower bound and any
   records with a higher xmin could have been missed
   - `include-next-xids` This includes sending both the `epoch` and
   `nextxid` 32-bit ints. The epoch is a number that increments when xid
   rollover happens. This allows you to reconstruct the same txid you get
   from the `txid_current` function which accounts for rollover. This can
   be really useful to see at a point's time how far behind the slot you
   currently are.

   Addison Higham committed Apr 25, 2018
   Configuration menu

   • View commit details
   • Copy full SHA for d4be228
   • Browse repository at this point

   Copy the full SHA

   d4be228 View commit details

   Browse the repository at this point in the history