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Postgres - Disk Usage - Finding the largest databases in your cluster
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-- Finding the largest databases in your cluster | |
SELECT d.datname AS Name, pg_catalog.pg_get_userbyid(d.datdba) AS Owner, | |
CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT') | |
THEN pg_catalog.pg_size_pretty(pg_catalog.pg_database_size(d.datname)) | |
ELSE 'No Access' | |
END AS Size | |
FROM pg_catalog.pg_database d | |
ORDER BY | |
CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT') | |
THEN pg_catalog.pg_database_size(d.datname) | |
ELSE NULL | |
END DESC -- nulls first | |
LIMIT 20 | |
-- Finding the total size of your biggest tables | |
SELECT nspname || '.' || relname AS "relation", | |
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' | |
ORDER BY pg_total_relation_size(C.oid) DESC | |
LIMIT 20; | |
-- https://wiki.postgresql.org/wiki/Disk_Usage |
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Thanks for this. Can we get the output in KB/MB/GB only ?