# [[guc:autovacuum_multixact_freeze_max_age]]

> 触发 multixact 防回卷 vacuum 的年龄。
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触发 multixact 防回卷 vacuum 的年龄。

[PostgreSQL 18 官方参数参考](https://www.postgresql.org/docs/18/runtime-config.html#GUC-AUTOVACUUM-MULTIXACT-FREEZE-MAX-AGE)

## 被哪些等待事件引用 {#wait-events}

- [IPC/MultixactCreation](/zh/ipc/multixact-creation/)
- [LWLock/MultiXactGen](/zh/lwlock/multi-xact-gen/)
- [LWLock/MultiXactMemberBuffer](/zh/lwlock/multi-xact-member-buffer/)
- [LWLock/MultiXactMemberSLRU](/zh/lwlock/multi-xact-member-slru/)
- [LWLock/MultiXactOffsetBuffer](/zh/lwlock/multi-xact-offset-buffer/)
- [LWLock/MultiXactOffsetSLRU](/zh/lwlock/multi-xact-offset-slru/)
- [LWLock/MultiXactTruncation](/zh/lwlock/multi-xact-truncation/)