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Re: Add 64-bit XIDs into PostgreSQL 15 - Mailing list pgsql-hackers

From Pavel Borisov
Subject Re: Add 64-bit XIDs into PostgreSQL 15
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Msg-id CALT9ZEGpr3WEPFJL_EHtzE-vF09SPYeAVyoPYZUuG1=yX5oi+w@mail.gmail.com
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In response to Re: Add 64-bit XIDs into PostgreSQL 15  (Maxim Orlov <orlovmg@gmail.com>)
Responses Re: Add 64-bit XIDs into PostgreSQL 15
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Hi, hackers!

I've updated a patchset for 64-xid (actually only 0008 patch is changed).

The update addresses a corner case of not completing VACUUM FULL after pg_upgrade from the cluster containing a maximum size tuple in plain storage. Page with such tuples can not be converted to 64-xid format as there is no room for HeapPageSpecial, so it remains in DoubleXmax format and this can not be changed until that tuple version is deleted. The change makes VACUUM FULL copy these pages instead of throwing an error.

The patchset is also rebased onto a current master branch.

Your discussion and thoughts are very much welcome!

--
Best regards,
Pavel Borisov

Postgres Professional: http://postgrespro.com
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