8000 Mention pg_upgrade sets autovacuum_freeze_max_age to maximum. · postgres/postgres@da3418c · GitHub
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Mention pg_upgrade sets autovacuum_freeze_max_age to maximum.
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‎contrib/pg_upgrade/server.c

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@@ -172,8 +172,8 @@ start_postmaster(ClusterInfo *cluster, bool quiet)
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*
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* Using autovacuum=off disables cleanup vacuum and analyze, but
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* freeze vacuums can still happen, so we set
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* autovacuum_freeze_max_age very high. We assume all datfrozenxid and
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* relfrozen values are less than a gap of 2000000000 from the current
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* autovacuum_freeze_max_age to its maximum. We assume all datfrozenxid
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* and relfrozen values are less than a gap of 2000000000 from the current
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* xid counter, so autovacuum will not touch them.
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*/
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snprintf(cmd, sizeof(cmd),

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