Re: Add MAIN_RELATION_CLEANUP and SECONDARY_RELATION_CLEANUP options to VACUUM

From: Vik Fearing <vik(dot)fearing(at)2ndquadrant(dot)com>
To: "Bossart, Nathan" <bossartn(at)amazon(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Add MAIN_RELATION_CLEANUP and SECONDARY_RELATION_CLEANUP options to VACUUM
Date: 2020-01-21 21:38:20
Message-ID: 657e9792-29b2-9dda-0ea3-73d8ba28b2ac@2ndquadrant.com
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On 21/01/2020 22:21, Bossart, Nathan wrote:
> I've attached a patch for a couple of new options for VACUUM:
> MAIN_RELATION_CLEANUP and SECONDARY_RELATION_CLEANUP. The motive
> behind these options is to allow table owners to easily vacuum only
> the TOAST table or only the main relation. This is especially useful
> for TOAST tables since roles do not have access to the pg_toast schema
> by default and some users may find it difficult to discover the name
> of a relation's TOAST table.

Could you explain why one would want to do this?  Autovacuum will
already deal with the tables separately as needed, but I don't see when
a manual vacuum would want to make this distinction.

--

Vik Fearing

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