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Previously, pg_sync_replication_slots() would finish without synchronizing slots that didn't meet requirements, rather than failing outright. This could leave some failover slots unsynchronized if required catalog rows or WAL segments were missing or at risk of removal, while the standby continued removing needed data. To address this, the function now waits for the primary slot to advance to a position where all required data is available on the standby before completing synchronization. It retries cyclically until all failover slots that existed on the primary at the start of the call are synchronized. Slots created after the function begins are not included. If the standby is promoted during this wait, the function exits gracefully and the temporary slots will be removed. Author: Ajin Cherian <itsajin@gmail.com> Author: Hou Zhijie <houzj.fnst@fujitsu.com> Reviewed-by: Shveta Malik <shveta.malik@gmail.com> Reviewed-by: Japin Li <japinli@hotmail.com> Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com> Reviewed-by: Ashutosh Sharma <ashu.coek88@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Yilin Zhang <jiezhilove@126.com> Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Discussion: https://postgr.es/m/CAFPTHDZAA%2BgWDntpa5ucqKKba41%3DtXmoXqN3q4rpjO9cdxgQrw%40mail.gmail.com |
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