Commit 464824323e has added the support of the streaming of in-progress transactions into the built-in logical replication. The attached patch adds the statistics about transactions streamed to the decoding output plugin from ReorderBuffer. Users can query the pg_stat_replication_slots view to check these stats and call pg_stat_reset_replication_slot to reset the stats of a particular slot. Users can pass NULL in pg_stat_reset_replication_slot to reset stats of all the slots.
Commit 9868167500 has added the basic infrastructure to capture the stats of slot and this commit extends the statistics collector to track additional information about slots. This patch was originally written by Ajin Cherian [1]. I have fixed bugs and modified some comments in the code. Thoughts? [1] - https://www.postgresql.org/message-id/CAFPTHDZ8RnOovefzB%2BOMoRxLSD404WRLqWBUHe6bWqM5ew1bNA%40mail.gmail.com -- With Regards, Amit Kapila
v2-0001-Track-statistics-for-streaming-of-changes-from-Re.patch
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