Обсуждение: toast tables and toast indexes

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toast tables and toast indexes

От
"Godfrin, Philippe E"
Дата:

Folks,

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?

 

Phil Godfrin | Database Administration

NOV

NOV US | Engineering Data

9720 Beechnut St | Houston, Texas 77036

M  281.825.2311

E   Philippe.Godfrin@nov.com

 

Re: toast tables and toast indexes

От
Michael Paquier
Дата:
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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