db size and tables size difference

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Tom Lane wrote:

Isabella Ghiurea <isabella.ghiurea@xxxxxxxxxxxxxx> writes:
> The issue may be   with pg_size_pretty()  results, I don't have details
> knowledge of this function.

I doubt it, that's a pretty simple function ... but if you don't trust
it, just remove the pg_size_pretty call and look directly at the output
of the size functions.

Hi Tom,
pg_tablespace_size() function shows same size as tables size SQL statements close to 6.5 GB , here is output for the bigest tablespace
select pg_tablespace_size('caom_data');
pg_tablespace_size
--------------------
        6218108932
select pg_tablespace_size('caom_index');
pg_tablespace_size
--------------------
         837201924
select pg_tablespace_size('tap_data');
pg_tablespace_size
--------------------
             65689

select pg_database_size('cvodb');
pg_database_size
------------------
     13279260268
How can I get more details of  how pg_database_size()  is been executed ?


> select pg_size_pretty(pg_database_size('db1'));

Just to double check here ... you're sure you're naming the correct
database in this call?

yes
Thank you
Isabella

                        regards, tom lane



--
-----------------------------------------------------------
Isabella A. Ghiurea
Isabella.Ghiurea@xxxxxxxxxxxxxx
Canadian Astronomy Data Centre | http://www1.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/ National Research Council of Canada, Herzberg Institute of Astrophysics 5071 West Saanich Road, Victoria BC V9E 2E7, Canada
Phone: 250 363-3446 fax: 250 363-0045


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