From: | Rajesh Kumar Mallah <mallah(at)trade-india(dot)com> |
---|---|
To: | PostgResql SQL Mailing List <pgsql-sql(at)postgresql(dot)org> |
Subject: | abnormal size of the on-disk file. |
Date: | 2002-04-26 14:52:31 |
Message-ID: | 3CC969AF.418C544B@trade-india.com |
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Thread: | |
Lists: | pgsql-sql |
Hi There,
I have a small table companies (< 300 rows) and its on-disk size shows
abnormal
i check it as follows:
SELECT relname,relfilenode from pg_class where relfilenode=30977;
relname | relfilenode
-----------+-------------
companies | 30977
(1 row)
ls -lsh 30977
487M -rw------- 1 postgres postgres 486M Apr 26 20:27 30977
bash-2.03$
i created a new table with the same content
tradein_clients=> CREATE TABLE t_a as select * from companies;
SELECT
its on disk file is very small
tradein_clients=> SELECT relname,relfilenode from pg_class where
relname='t_a';
relname | relfilenode
---------+-------------
t_a | 87812505
(1 row)
bash-2.03$ ls -lsh 87812505
196k -rw------- 1 postgres postgres 192k Apr 26 20:27 87812505
bash-2.03$
Can anyone explain this ..
does unvaccuming makes tables x2000 times largers??
regds
mallah.
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