On Wed, 13 Feb 2008, Carol Walter wrote:
I've struggled with this one too. You can get the size of databases with
SELECT pg_database_size('database name'); You can get the size of tables
with SELECT pg_relation_size('table name');
Carol
On Feb 13, 2008, at 1:43 PM, Peter Kovacs wrote:
Hi,
How can I find out how much space is taken up by database objects in data
files?
Give this query a try. It's a variation of one posted on this list some time
ago. Unfortunately, I'm not sure who to credit for the original post. This
one takes into account index and toast size and sorts descending by totalsize.
SELECT nspname, relname,
pg_size_pretty(tablesize+indexsize+toastsize+toastindexsize) AS totalsize
FROM
(SELECT ns.nspname, cl.relname, pg_relation_size(cl.oid) AS tablesize,
COALESCE((SELECT SUM(pg_relation_size(indexrelid))::bigint
FROM pg_index WHERE cl.oid=indrelid), 0) AS indexsize,
CASE WHEN reltoastrelid=0 THEN 0
ELSE pg_relation_size(reltoastrelid)
END AS toastsize,
CASE WHEN reltoastrelid=0 THEN 0
ELSE pg_relation_size((SELECT reltoastidxid FROM pg_class ct
WHERE ct.oid = cl.reltoastrelid))
END AS toastindexsize
FROM pg_class cl, pg_namespace ns
WHERE cl.relnamespace = ns.oid
AND ns.nspname NOT IN ('pg_catalog', 'information_schema')
AND cl.relname IN
(SELECT table_name FROM information_schema.tables
WHERE table_type = 'BASE TABLE')) ss
ORDER BY tablesize+indexsize+toastsize+toastindexsize DESC;
--
Jeff Frost, Owner <jeff@xxxxxxxxxxxxxxxxxxxxxx>
Frost Consulting, LLC http://www.frostconsultingllc.com/
Phone: 650-780-7908 FAX: 650-649-1954
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
