| From: | Michael Paquier <michael(at)paquier(dot)xyz> |
|---|---|
| To: | "Godfrin, Philippe E" <Philippe(dot)Godfrin(at)nov(dot)com> |
| Cc: | "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: toast tables and toast indexes |
| Date: | 2022-01-04 12:30:57 |
| Message-ID: | YdQ+AdrSqDr08RZI@paquier.xyz |
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| Lists: | pgsql-hackers |
On Tue, Dec 28, 2021 at 01:10:53PM +0000, Godfrin, Philippe E wrote:
> While experimenting with toast tables I noticed that the toast index
> lands in the same tablespace as the toast table itself. Is there a
> way to make the toast indexes create in a different tablespace?
No. See create_toast_table() where the toast table and its index use
the same tablespace as the relation they depend on.
Now, you could use allow_system_table_mods and an ALTER INDEX .. SET
TABLESPACE to change that for the index, but this is a developer
option and you should *not* use that for anything serious:
https://www.postgresql.org/docs/devel/runtime-config-developer.html
"Ill-advised use of this setting can cause irretrievable data loss or
seriously corrupt the database system."
--
Michael
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