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Commitc978738

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Remove overzealous VACUUM visibility map assertion.
The all_visible_according_to_vm variable's value is inherently prone tobecoming invalidated concurrently, since it is set before we evenacquire a lock on a related heap page buffer.Oversight in commit7136bf3, which added the assertion in passing.Author: Masahiko Sawada <sawada.mshk@gmail.com>Reported-By: Tang <tanghy.fnst@fujitsu.com>Diagnosed-By:: Masahiko Sawada <sawada.mshk@gmail.com>Discussion:https://postgr.es/m/CAD21AoDzgc8_MYrA5m1fyydomw_eVKtQiYh7sfDK4KEhdMsf_g@mail.gmail.com
1 parent3fe773b commitc978738

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‎src/backend/access/heap/vacuumlazy.c

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@@ -1344,7 +1344,6 @@ lazy_scan_heap(LVRelState *vacrel, VacuumParams *params, bool aggressive)
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lazy_scan_prune(vacrel,buf,blkno,page,vistest,&prunestate);
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Assert(!prunestate.all_visible|| !prunestate.has_lpdead_items);
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Assert(!all_visible_according_to_vm||prunestate.all_visible);
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/* Remember the location of the last page with nonremovable tuples */
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if (prunestate.hastup)

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