PG_STAT_REPLICATION

PG_STAT_REPLICATION displays information about log synchronization status, such as the locations of the sender sending logs and the receiver receiving logs.

**Table 1** PG_STAT_REPLICATION columns
Name	Type	Description
pid	bigint	PID of the thread
usesysid	oid	User system ID
usename	name	Username
application_name	text	Application name
client_addr	inet	Client address.
client_hostname	text	Client name
client_port	integer	Client port number
backend_start	timestamp with time zone	Start time of the program
state	text	Log replication state (catch-up or consistent streaming)
sender_sent_location	text	Location where the sender sends logs
receiver_write_location	text	Location where the receiver writes logs
receiver_flush_location	text	Location where the receiver flushes logs
receiver_replay_location	text	Location where the receiver replays logs
sync_priority	integer	Priority of synchronous duplication (0 indicates asynchronization)
sync_state	text	Synchronization state (asynchronous duplication, synchronous duplication, or potential synchronization)