I found the following script useful; for calculating database size:-
-- Query returns size of a database calculated from the no. 8k pages allocated to tables
SELECT
sum( relpages*8/1024 ) as MB
FROM
pg_class
WHERE
-- relname != ''
-- relname = 'tablename'
relnamespace = '2200'
SELECT
sum( relpages*8/1024 ) as MB
FROM
pg_class
WHERE
-- relname != ''
-- relname = 'tablename'
relnamespace = '2200'
On 4/17/07, Chuck Amadi <chuck.amadi@xxxxxxxxxxx> wrote:
I have been given a task to try a proof of concept of migrating are active databases from PostgreSQL 8.0.1 to 8.2.3
I will install and configPostgreSQL on my local w/s and replicate the database users etc etc.
I have had a look inside /var/lib/pgsql/data/base and there are numerous files (db's) which I believe is where I can check data base size.
1 108012 114465 122407 1261267 1261963 17229 17233 17234 17235 174066 19247 205009 21272 2793694 2794334 333245 333375
I am aware that Postgresql creates directories to keep each database in.
These directories aren't names,they are kept as the *'OID's *of each
database (oid's are*"object identifiers"*).
Previously I just run pg_dump and thus run ls -lh on the db dump. Anyway
of checking a size of a given database I have tried
the sql using select pg_database_size ('dbaname'); but no joy.
Cheers
Chuck
--
Chuck Amadi
ROK Corporation Limited
Ty ROK,
Dyffryn Business Park,
Llantwit Major Road,
Llandow,
Vale Of Glamorgan.
CF71 7PY
Tel: 01446 795 839
Fax: 01446 794 994
International Tel: +44 1446 795 839
email: chuck.amadi@xxxxxxxxxxx
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