my table is empty, pg_relation_size(name) return 38 MB

From: Shivakumar Ramannavar <shivasr(at)gmail(dot)com>
To: pgsql-admin(at)postgresql(dot)org
Subject: my table is empty, pg_relation_size(name) return 38 MB
Date: 2011-08-04 11:22:36
Message-ID: CACdOLXZjY-UekAepXP98NLrxABo-nV+7ND_vQPvCbfUO9sgfvA@mail.gmail.com
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Hi Team,

Though my table is empty, pg_relation_size(name) return 38 MB. I use below
query to determine tables disk usages.

SELECT nspname || '.' || relname AS "Table",
pg_total_relation_size(C.oid) "Size",
pg_size_pretty(pg_total_relation_size(C.oid)) AS "Total size"
FROM pg_class C
LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
WHERE nspname NOT IN ('pg_catalog', 'information_schema')
AND C.relkind <> 'i'
AND nspname !~ '^pg_toast'

Please help,
Thanks!
Shiva
--
Shivakumar Ramannavar

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