Re: reloption to prevent VACUUM from truncating empty pages at the end of relation

Sergei Kornilov <sk@zsrv.org>

From: Sergei Kornilov <sk@zsrv.org>

To: Alvaro Herrera <alvherre@2ndquadrant.com>, "Tsunakawa, Takayuki" <tsunakawa.takay@jp.fujitsu.com>

Cc: 'Michael Paquier' <michael@paquier.xyz>, 'Robert Haas' <robertmhaas@gmail.com>, Julien Rouhaud <rjuju123@gmail.com>, Laurenz Albe <laurenz.albe@cybertec.at>, "Jamison, Kirk" <k.jamison@jp.fujitsu.com>, Amit Kapila <amit.kapila16@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Fujii Masao <masao.fujii@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>

Date: 2019-02-28T07:50:28Z

Lists: pgsql-hackers

Commits

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Add TRUNCATE parameter to VACUUM.
- b84dbc8eb80b 12.0 landed
Add vacuum_truncate reloption.
- 119dcfad988d 12.0 landed
Allow VACUUM to be run with index cleanup disabled.
- a96c41feec6b 12.0 cited

Hi

> The default should always be to shrink, unless either the VACUUM
> option or the reloption turn that off. (So it doesn't make sense to set
> either the VACUUM option or the reloption to "on").

I think VACUUM option can be set to "on" by hand in order to override reloption only for this VACUUM call.

regards, Sergei