pg_prepared_xacts
The view pg_prepared_xacts displays information about transactions that are currently prepared for two-phase commit .
pg_prepared_xacts contains one row per prepared transaction. An entry is removed when the transaction is committed or rolled back.
pg_prepared_xacts Columns
| Column Type | Description |
|---|---|
transaction xid | Numeric transaction identifier of the prepared transaction |
gid text | Global transaction identifier that was assigned to the transaction |
prepared timestamptz | Time at which the transaction was prepared for commit |
owner name (references pg_authid.rolname) | Name of the user that executed the transaction |
database name (references pg_database.datname) | Name of the database in which the transaction was executed |
When the pg_prepared_xacts view is accessed, the internal transaction manager data structures are momentarily locked, and a copy is made for the view to display. This ensures that the view produces a consistent set of results, while not blocking normal operations longer than necessary. Nonetheless there could be some impact on database performance if this view is frequently accessed.