49.80. pg_replication_slots
Thepg_replication_slots view provides a listing of all replication slots that currently exist on the database cluster, along with their current state.
For more on replication slots, seeSection 25.2.6 andChapter 46.
Table 49.81. pg_replication_slots Columns
| Name | Type | References | Description |
|---|---|---|---|
slot_name | name | A unique, cluster-wide identifier for the replication slot | |
plugin | name | The base name of the shared object containing the output plugin this logical slot is using, or null for physical slots. | |
slot_type | text | The slot type -physical orlogical | |
datoid | oid | | The OID of the database this slot is associated with, or null. Only logical slots have an associated database. |
database | text | | The name of the database this slot is associated with, or null. Only logical slots have an associated database. |
temporary | boolean | True if this is a temporary replication slot. Temporary slots are not saved to disk and are automatically dropped on error or when the session has finished. | |
active | boolean | True if this slot is currently actively being used | |
active_pid | integer | The process ID of the session using this slot if the slot is currently actively being used.NULL if inactive. | |
xmin | xid | The oldest transaction that this slot needs the database to retain.VACUUM cannot remove tuples deleted by any later transaction. | |
catalog_xmin | xid | The oldest transaction affecting the system catalogs that this slot needs the database to retain.VACUUM cannot remove catalog tuples deleted by any later transaction. | |
restart_lsn | pg_lsn | The address (LSN) of oldest WAL which still might be required by the consumer of this slot and thus won't be automatically removed during checkpoints. | |
confirmed_flush_lsn | pg_lsn | The address (LSN) up to which the logical slot's consumer has confirmed receiving data. Data older than this is not available anymore.NULL for physical slots. |