STATISTICS VIEW · Statistics view

pg_stat_lock

PostgreSQL documentation ↗Source definition ↗

The pg_stat_lock view will contain one row for each lock type, showing cluster-wide locks statistics.

First seen PG 19Last seen PG 19Columns 5

9.0 9.1 9.2 9.3 9.4 9.5 9.6 10 11 12 13 14 15 16 17 18 19^β3

Checked column by column against a PostgreSQL 19beta3 instance · Raw measurement record ↗

Columns PostgreSQL 19

pg_stat_lock

COLUMN	TYPE	DESCRIPTION
`locktype`	`text`	Type of the lockable object. See pg_locks for details.
`waits`	`bigint`	Number of times a lock of this type had to wait because of a conflicting lock. Only incremented when the lock was successfully acquired after waiting longer than deadlock_timeout.
`wait_time`	`double precision`	Total time spent waiting for locks of this type, in milliseconds. Only incremented when the lock was successfully acquired after waiting longer than deadlock_timeout.
`fastpath_exceeded`	`bigint`	Number of times a lock of this type could not be acquired via fast path because the fast path slot limit was exceeded. Increasing max_locks_per_transaction can reduce this number.
`stats_reset`	`timestamp with time zone`	Time at which these statistics were last reset.

Columns marked "implicit" are not included in SELECT *; some early statistics views are completed from same-version source, and the extra provenance is shown in the column description.

Column evolution matrix

Hover a cell for the column type

PresentAdded / type or attribute changeRemoved

COLUMN	9.0	9.1	9.2	9.3	9.4	9.5	9.6	10	11	12	13	14	15	16	17	18
`locktype`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`waits`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`wait_time`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`fastpath_exceeded`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`stats_reset`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–

9.0 is the coverage baseline; a column already present in the baseline is not marked as added. The matrix aligns columns by name, so a rename appears as the old column removed and a new column added.

Evolution timeline

Changes between adjacent majors

PostgreSQL 19 ← 18Catalog added

+ locktype+ waits+ wait_time+ fastpath_exceeded+ stats_reset

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