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Subject: Re: Disk is filling up with large files. How can I clean?
From: Philip Semanchuk <philip@americanefficient.com>
In-Reply-To: <CAKkG4_krrgxcGgUFoWu56xAS9CinZdpf5nDBfkfm0Mqf-dr6aw@mail.gmail.com>
Date: Wed, 9 Oct 2024 09:02:38 -0400
Cc: Mikael Petterson <mikaelpetterson@hotmail.com>,
 "pgsql-general@lists.postgresql.org" <pgsql-general@lists.postgresql.org>
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Message-Id: <D816802A-38F4-4402-A542-063DF5BB5648@americanefficient.com>
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 <CAKkG4_krrgxcGgUFoWu56xAS9CinZdpf5nDBfkfm0Mqf-dr6aw@mail.gmail.com>
To: =?utf-8?Q?Torsten_F=C3=B6rtsch?= <tfoertsch123@gmail.com>
Archived-At: <https://www.postgresql.org/message-id/D816802A-38F4-4402-A542-063DF5BB5648%40americanefficient.com>
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> On Oct 9, 2024, at 5:52=E2=80=AFAM, Torsten F=C3=B6rtsch =
<tfoertsch123@gmail.com> wrote:
>=20
> Filenames like 16665, 16665.1, 16665.2 etc all represent the same =
table (or similar). The number 16665 is called the file node.
>=20
> To get a list of file nodes for a specific database you can run:
>=20
> SELECT oid::regclass::text, relfilenode FROM pg_class;
>=20
> The /16384/ in the path represents the database. To decipher that you =
can run:
>=20
> SELECT datname, oid FROM pg_database;
>=20
> Once you have all that information, you know which database to connect =
to and which tables are big. Then you can DROP/DELETE/TRUNCATE or so.

Mikael, if you=E2=80=99re unaware of VACUUM FULL (as opposed to just =
VACUUM), you should read about that too.

Hope that helps,
Philip=