doc: Clarify when backend_xmin in pg_stat_replication can be NULL. Improve the documentation of pg_stat_replication to explain when the backend_xmin column becomes NULL. This happens when a replication slot is used (the xmin is then shown in pg_replication_slots) or when hot_standby_feedback is disabled.
Author: Renzo Dani <[email protected]> Reviewed-by: Fujii Masao <[email protected]> Discussion: https://postgr.es/m/CA+XOKQAMXzskpdUmj2sg03_5fmiXc2Gs0r3TX1_rmcFcqh+=x...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/e64aa1a39d4b8a9502be8ed8dfd67efd6f6acf28 Modified Files -------------- doc/src/sgml/monitoring.sgml | 4 ++++ 1 file changed, 4 insertions(+)
