PG_STAT_ACTIVITY¶
PG_STAT_ACTIVITY displays information about the current user's queries. If you have the rights of an administrator or the preset role, you can view all information about user queries.
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 | Backend thread ID |
lwtid | integer | Lightweight thread ID |
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 | The value is t if the backend is waiting for a lock or node. Otherwise, the value is f. |
enqueue | text | Queuing status of a statement. Its value can be:
|
state | text | Current overall state of this backend. Its value can be:
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
----------+---------+----------+--------+-----------------
postgres | omm | 10 | | 139968752121616
postgres | omm | 10 | | 139968903116560
db_tpcds | judy | 16398 | active | 139968391403280
postgres | omm | 10 | | 139968643069712
postgres | omm | 10 | | 139968680818448
postgres | joe | 16390 | | 139968563377936
(6 rows)
|
resource_pool | name | Resource pool used by the user |
stmt_type | text | Statement type |
query_id | bigint | ID of a query |
query | text | Text of the most recent query in this backend If state is active, this column shows the running 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) |