Created
September 25, 2012 09:26
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Show largest tables in MySQL and Postgresql
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# MySQL | |
SELECT CONCAT(table_schema, '.', table_name), | |
CONCAT(ROUND(table_rows / 1000000, 2), 'M') rows, | |
CONCAT(ROUND(data_length / ( 1024 * 1024 * 1024 ), 2), 'G') DATA, | |
CONCAT(ROUND(index_length / ( 1024 * 1024 * 1024 ), 2), 'G') idx, | |
CONCAT(ROUND(( data_length + index_length ) / ( 1024 * 1024 * 1024 ), 2), 'G') total_size, | |
ROUND(index_length / data_length, 2) idxfrac | |
FROM information_schema.TABLES | |
ORDER BY data_length + index_length DESC | |
LIMIT 10; | |
# Postgresql | |
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; | |
# Or: | |
SELECT relname, relpages FROM pg_class ORDER BY relpages DESC; |
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