PG_STAT_ACTIVITY

PG_STAT_ACTIVITY displays information about the current user's queries.

**Table 1** PG_STAT_ACTIVITY columns
Name	Type	Description
datid	oid	OID of the database that the user session connects to in the backend
datname	name	Name of the database that the user session connects to in the backend
pid	bigint	Process ID of the backend
usesysid	oid	OID of the user logging in to the backend
usename	name	OID of the user logging in to the backend
application_name	text	Name of the application connected to the backend
client_addr	inet	IP address of the client connected to the backend If this column 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 column will only be non-null for IP connections, and only when log_hostname is enabled.
client_port	integer	TCP port number that the client uses for communication with this backend, or -1 if a Unix socket is used
backend_start	timestamp with time zone	Startup time of the backend process, that is, the time when the client connects to the server.
xact_start	timestamp with time zone	Time when the current transaction was started, or NULL if no transaction is active. If the current query is the first of its transaction, this column is equal to the query_start column.
query_start	timestamp with time zone	Time when the currently active query was started, or if state is not active, when the last query was started
state_change	timestamp with time zone	Time for the last status change
waiting	boolean	Whether the backend is currently waiting on a lock. If it is, its value is true.
enqueue	text	Queuing status of a statement. Its value can be: waiting in queue: The statement is in the queue. waiting in global queue: The statement is in the global queue. waiting in respool queue: The statement is in the resource pool queue. waiting in ccn queue: The job is in the CCN queue. Empty: The statement is running.
state	text	Current overall state of this backend. Its value can be: active: The backend is executing queries. idle: The backend is waiting for new client commands. idle in transaction: The backend is in a transaction, but there is no statement being executed in the transaction. idle in transaction (aborted): The backend is in a transaction, but there are statements failed in the transaction. fastpath function call: The backend is executing a fast-path function. disabled: This state is reported if track_activities is disabled in this backend. NOTE: Common users can view only their own session status. The state information of other accounts is empty. For example, after user judy is connected to the database, the state information of user joe and the initial user omm in pg_stat_activity is empty. SELECT datname, usename, usesysid, state,pid FROM pg_stat_activity; datname \| usename \| usesysid \| state \| pid ----------+---------+----------+--------+----------------- gaussdb \| omm \| 10 \| \| 139968752121616 gaussdb \| omm \| 10 \| \| 139968903116560 db_tpcds \| judy \| 16398 \| active \| 139968391403280 gaussdb \| omm \| 10 \| \| 139968643069712 gaussdb \| omm \| 10 \| \| 139968680818448 gaussdb \| joe \| 16390 \| \| 139968563377936 (6 rows)
resource_pool	name	Resource pool used by the user
query_id	bigint	ID of a query
query	text	Text of this backend's most recent query If state is active, this column shows the executing query. In all other states, it shows the last query that was executed.
connection_info	text	A string in JSON format recording the driver type, driver version, driver deployment path, and process owner of the connected database (for details, see connection_info)