The gp_stat_replication view contains replication statistics of the walsender process that is used for WarehousePG Write-Ahead Logging (WAL) replication when coordinator or segment mirroring is enabled.

column	type	references	description
gp_segment_id	integer		Unique identifier of a segment (or coordinator) instance.
pid	integer		Process ID of the walsender backend process.
usesysid	oid		User system ID that runs the walsender backend process.
usename	name		User name that runs the walsender backend process.
application_name	text		Client application name.
client_addr	inet		Client IP address.
client_hostname	text		Client host name.
client_port	integer		Client port number.
backend_start	timestamp		Operation start timestamp.
backend_xmin	xid		The current backend's xmin horizon.
state	text		walsender state. The value can be: startup backup catchup streaming
sent_location	text		walsender xlog record sent location.
write_location	text		walreceiver xlog record write location.
flush_location	text		walreceiver xlog record flush location.
replay_location	text		Coordinator standby or segment mirror xlog record replay location.
sync_priority	integer		Priority. The value is 1.
sync_state	text		walsendersynchronization state. The value is sync.
sync_error	text		walsender synchronization error. none if no error.

Parent topic: System Catalogs Definitions