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Re: does postgresql backup require additional space on disk

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On 5/13/19 5:39 PM, Julie Nishimura wrote:
LOL. Adrian, I so appreciate your help.

So, since this server is obviously very old, and it seems like 3 other tablespaces were added in the past (vol1 - 2.7 tb, vol2 - 2.7 tb, vol3 - 16 tb), and I am about to add another vol - vol4 (4 tb), I am trying to see where the objects are actually located.

So, for example, working only with one database at a time.

The database has the following:
ALTER DATABASE er_temp
   SET default_tablespace = 'vol3';

My postgresql.conf also lists the following:
default_tablespace = 'vol3'

There is one table "test", and its DDL (according to PGAdmin):
CREATE TABLE test
(
   id integer,
   key character varying,
   value character varying
)
WITH (
   OIDS=FALSE
)
TABLESPACE vol1;

but if I run the following command, I have empty string as tablespace

er_temp=# SELECT tablespace
FROM pg_tables
WHERE tablename = 'test' AND schemaname = 'public';
  tablespace
------------

(1 row)

Is test in the public schema?


However, if I create new table, it will go to vol3:

er_temp=# CREATE TABLE test_j
er_temp-# (
er_temp(#   id integer,
er_temp(#   key character varying,
er_temp(#   value character varying
er_temp(# );
CREATE TABLE
er_temp=# SELECT tablespace
FROM pg_tables
WHERE tablename = 'test_j' AND schemaname = 'public';
  tablespace
------------
  vol3
(1 row)

So, why would tablespace for "test" show as empty string if it is not default? Where are the files for "test" table?

Thanks,
Julie



--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx





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