pg_stat_get_backend_wait_event_type()
A function a backend's wait event type
pg_stat_get_backend_wait_event_type()
is a system function returning the current wait event type for the specified backend.
pg_stat_get_backend_wait_event_type()
was added in PostgreSQL 9.6.
Usage
pg_stat_get_backend_wait_event_type (integer
) →text
The backend is specified by a backend ID number reported by pg_stat_get_backend_idset()
; see below for an execution example.
NULL
is returned if there is no wait event type.
The value returned by pg_stat_get_backend_wait_event_type()
corresponds to the column wait_event_type
in pg_stat_activity
.
Related functions
The following related functions are also available:
pg_stat_get_backend_activity()
pg_stat_get_backend_activity_start()
pg_stat_get_backend_client_addr()
pg_stat_get_backend_client_port()
pg_stat_get_backend_dbid()
pg_stat_get_backend_pid()
pg_stat_get_backend_start()
pg_stat_get_backend_userid()
pg_stat_get_backend_wait_event()
pg_stat_get_backend_xact_start()
Change history
- PostgreSQL 9.6
- added (commit 53be0b1a)
Examples
Basic usage example for pg_stat_get_backend_wait_event_type()
:
postgres=# SELECT pg_stat_get_backend_pid(s.backendid) AS pid, pg_stat_get_backend_wait_event_type(s.backendid) AS wait_event_type FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS s; pid | wait_event_type ---------+----------------- 1451980 | Activity 1451982 | Activity 2382558 | 1764534 | Client 1451978 | 1451977 | 1451979 | (7 rows)
References
- PostgreSQL documentation: Per-Backend Statistics Functions