gp_stat_activity

The pg_stat_activity view is a cluster-wide view that displays the pg_stat_activity information from every primary segment.

column	type	references	description
gp_segment_id	integer		Unique identifier of a segment (or coordinator) instance.
datid	oid	pg_database.oid	Database OID
datname	name		Database name
pid	integer		Process ID of this backend
sess_id	integer		Session ID
leader_pid	integer		Process ID of the leader of the session.
usesysid	oid	pg_authid.oid	OID of the user logged into this backend
usename	name		Name of the user logged into this backend
application_name	text		Name of the application that is connected to this backend
client_addr	inet		IP address of the client connected to this backend. If this field is null, it indicates either that the client is connected via a Unix socket on the server machine or that this is an internal process such as autovacuum.
client_hostname	text		Host name of the connected client, as reported by a reverse DNS lookup of client_addr. This field will only be non-null for IP connections, and only when log_hostname is enabled.
client_port	integer		TCP port number that the client is using for communication with this backend, or -1 if a Unix socket is used
backend_start	timestamptz		Time backend process was started
xact_start	timestamptz		Transaction start time
query_start	timestamptz		Time query began execution
state_change	timestampz		Time when the state was last changed
wait_event_type	text		Type of event for which the backend is waiting
wait_event	text		Wait event name if backend is currently waiting
state	text		Current overall state of this backend. Possible values are: - active: The backend is running a query. - idle: The backend is waiting for a new client command. - idle in transaction: The backend is in a transaction, but is not currently running a query. - idle in transaction (aborted): This state is similar to idle in transaction, except one of the statements in the transaction caused an error. - fastpath function call: The backend is running a fast-path function. - disabled: This state is reported if track_activities is deactivated in this backend.
backend_xid	xid		The current transaction ID (XID) being executed by this backend, if any.
backend_xmin	xid		The minimum transaction ID that this backend needs to retain.
query_id	bigint		The query ID of the currently executing query.
query	text		Text of this backend's most recent query. If state is active this field shows the currently running query. In all other states, it shows the last query that was run.
backend_type	text	Describes the type of backend process (for example, "client backend", "worker process", "autovacuum worker").
rsgid	oid	pg_resgroup.oid	Resource group OID or 0.
rsgname	text	pg_resgroup.rsgname	Resource group name or unknown.