Hi Hackers,
I just noticed that relation_mark_replica_identity() unconditionally opened pg_class with RowExclusiveLock even in cases where relreplident has no change, which incurred unnecessary relation opens, lock acquisition.
I just made a tiny refactor that defers opening pg_class until we know that an update to relreplident is required.
I have manually tested the change, and "make check" passed.
Best regards,
Chao Li (Evan)
---------------------