Re: Disabling vacuum truncate for autovacuum

On 2025/03/15 0:42, Nathan Bossart wrote:
> I should also mention that we just have a few weeks left in the v18
> development cycle. The code itself seems pretty straightforward, so if we
> can agree on behavior and nomenclature, I'll do my darndest to get this
> responsibly committed in time.

+1

Here are two minor review comments from me.

+ <varlistentry id="guc-vacuum-truncate" xreflabel="autovacuum">

This xreflabel should be "vacuum_truncate", not "autovacuum".

- lock on the table. The <literal>TRUNCATE</literal> parameter
- of <link linkend="sql-vacuum"><command>VACUUM</command></link>, if specified, overrides the value
- of this option.
+ Per-table value for <xref linkend="guc-vacuum-truncate"/> parameter.

It was explicitly documented that the TRUNCATE option in the VACUUM
command overrides the vacuum_truncate reloption, but this information
has been removed in the patch. Shouldn't we keep it to clarify
the priority of these settings?

Regards,

--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION