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Previously, MultiXactId wraparound hints suggested dropping stale replication slots. While that advice is appropriate for transaction ID wraparound, where replication slots can hold back XID horizons, it was misleading for MultiXactId wraparound. Following it could lead users to drop replication slots unnecessarily without helping resolve the MultiXactId wraparound condition. MultiXact cleanup is not directly delayed by replication slots. Instead, it depends on whether old MultiXactIds can still be seen as live by running transactions. This commit removes the replication slot advice from MultiXactId wraparound hints, and documents that stale replication slots are normally not relevant to resolving MultiXactId wraparound problems. Backpatch to all supported branches. BUG #18876 Reported-by: Haruka Takatsuka <harukat@sraoss.co.jp> Author: Fujii Masao <masao.fujii@gmail.com> Discussion: https://postgr.es/m/18876-0d0b53bad5a1f4c1@postgresql.org Backpatch-through: 14 |
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