From: | PG Bug reporting form <noreply(at)postgresql(dot)org> |
---|---|
To: | pgsql-bugs(at)lists(dot)postgresql(dot)org |
Cc: | ap(at)zip(dot)com(dot)au |
Subject: | BUG #15582: ALTER TABLE/INDEX ... SET TABLESPACE does not free disk space |
Date: | 2019-01-09 02:21:48 |
Message-ID: | 15582-dae8ba537137883d@postgresql.org |
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Lists: | pgsql-bugs |
The following bug has been logged on the website:
Bug reference: 15582
Logged by: Andrew P
Email address: ap(at)zip(dot)com(dot)au
PostgreSQL version: 11.1
Operating system: Linux/Debian stretch
Description:
Hi,
I've added a tablespace recently to help deal with almost running out of
disk space.
I then tried to use it with:
ALTER TABLE schema.table SET TABLESPACE hydro2_tmp;
This worked in so far as disk space was used on hydro2_tmp but nothing was
ever freed in the default location.
I tried a VACUUM FULL but that did not help.
Then I tried moving the indexes belonging to the table but that also did not
help.
Everywhere I've read and everyone I spoke to said that this is a move
operation but it appears to be a copy so, unless I missed something, this
appears to be a bug.
The two table spaces are on separate drives and postgres is from postgres'
apt repository.
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