pg_prepared_xacts #The view pg_prepared_xacts displays information about transactions that are currently prepared for two-phase commit (see PREPARE TRANSACTION for details).
pg_prepared_xacts contains one row per prepared transaction. An entry is removed when the transaction is committed or rolled back.
Table 54.16. pg_prepared_xacts Columns
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Column Type Description |
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Numeric transaction identifier of the prepared transaction |
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Global transaction identifier that was assigned to the transaction |
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Time at which the transaction was prepared for commit |
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Name of the user that executed the transaction |
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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.
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