pgsql: Remove overzealous VACUUM visibility map assertion.

Remove overzealous VACUUM visibility map assertion.

The all_visible_according_to_vm variable's value is inherently prone to
becoming invalidated concurrently, since it is set before we even
acquire a lock on a related heap page buffer.

Oversight in commit 7136bf34, 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

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/c9787385db47ba423d845b34d58e158551c6335d

Modified Files
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src/backend/access/heap/vacuumlazy.c | 1 -
1 file changed, 1 deletion(-)