Menemukan Ukuran(size) berbagai objek dari database Postgres

Menemukan ukuran tabel dari semua relasi yang ada pada database

SELECT nspname || '.' || relname AS "relation",
pg_size_pretty(pg_relation_size(C.oid)) AS "size"
FROM pg_class C
LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
WHERE nspname NOT IN ('pg_catalog', 'information_schema')
ORDER BY pg_relation_size(C.oid) DESC
LIMIT 20;

Contoh Output

relation | size
------------------------+------------
public.accounts | 326 MB
public.accounts_pkey | 44 MB
public.history | 592 kB
public.tellers_pkey | 16 kB
public.branches_pkey | 16 kB
public.tellers | 16 kB
public.branches | 8192 bytes

Mencari Ukuran(size) dari table yang berukuran besar saja

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;

Posted in: DataBase