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9c4f5192f6
Using a hot standby server as the source has not been possible, because pg_rewind creates a temporary table in the source system, to hold the list of file ranges that need to be fetched. Refactor it to queue up the file fetch requests in pg_rewind's memory, so that the temporary table is no longer needed. Also update the logic to compute 'minRecoveryPoint' correctly, when the source is a standby server. Reviewed-by: Kyotaro Horiguchi, Soumyadeep Chakraborty Discussion: https://www.postgresql.org/message-id/0c5b3783-af52-3ee5-f8fa-6e794061f70d%40iki.fi