Hi, PostgreSQL 9.4 document for pg_stat_replication view mentions column name as "backend_xid", whereas when a view described it shows column name as "backend_xmin". http://www.postgresql.org/docs/devel/static/monitoring-stats.html#PG-STAT-REPLICATION-VIEW
postgres=# select version(); -[ RECORD 1 ]------------------------------------------------------------------------------------------------------------ version | PostgreSQL 9.4beta1 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3), 64-bit postgres=# \d pg_stat_replication View "pg_catalog.pg_stat_replication" Column | Type | Modifiers ------------------+--------------------------+----------- pid | integer | usesysid | oid | usename | name | application_name | text | client_addr | inet | client_hostname | text | client_port | integer | backend_start | timestamp with time zone | * backend_xmin* | xid | state | text | sent_location | pg_lsn | write_location | pg_lsn | flush_location | pg_lsn | replay_location | pg_lsn | sync_priority | integer | sync_state | text | Is it a typo in pg_stat_replication view column ? --- Regards, Raghavendra EnterpriseDB Corporation Blog: http://raghavt.blogspot.com/