# [[guc:autovacuum_freeze_max_age]]

> Transaction age that forces anti-wraparound vacuum.
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Transaction age that forces anti-wraparound vacuum.

[Official PostgreSQL 18 parameter reference](https://www.postgresql.org/docs/18/runtime-config.html#GUC-AUTOVACUUM-FREEZE-MAX-AGE)

## Referenced by wait events {#wait-events}

- [IO/LogicalSubxactRead](/io/logical-subxact-read/)
- [IO/LogicalSubxactWrite](/io/logical-subxact-write/)
- [IPC/XactGroupUpdate](/ipc/xact-group-update/)
- [LWLock/PerXactPredicateList](/lwlock/per-xact-predicate-list/)
- [LWLock/SerializableXactHash](/lwlock/serializable-xact-hash/)
- [LWLock/XactBuffer](/lwlock/xact-buffer/)
- [LWLock/XactSLRU](/lwlock/xact-slru/)
- [LWLock/XactTruncation](/lwlock/xact-truncation/)