李大仁博客

--查出单个表的大小
SELECT pg_size_pretty(pg_relation_size('TABLENAME'));

--查出单个表的大小 select pg_size_pretty(pg_relation_size('TABLENAME'));

-- 查出表大小按大小含Index
SELECT
"table_name",
pg_size_pretty(table_size) AS table_size,
pg_size_pretty(indexes_size) AS indexes_size,
pg_size_pretty(total_size) AS total_size
FROM (
SELECT
TABLE_NAME,
SUBSTRING("table_name",1,10) AS short_name,
pg_table_size(TABLE_NAME) AS table_size,
pg_indexes_size(TABLE_NAME) AS indexes_size,
pg_total_relation_size(TABLE_NAME) AS total_size
FROM (
SELECT ('"' || table_schema || '"."' || TABLE_NAME || '"') AS TABLE_NAME
FROM information_schema.tables
) AS all_tables
WHERE all_tables.table_name LIKE '%TABLENAME%'
ORDER BY total_size DESC
) AS pretty_sizes

-- 查出表大小按大小含Index SELECT "table_name", pg_size_pretty(table_size) AS table_size, pg_size_pretty(indexes_size) AS indexes_size, pg_size_pretty(total_size) AS total_size FROM ( SELECT table_name, SUBSTRING("table_name",1,10) as short_name, pg_table_size(table_name) AS table_size, pg_indexes_size(table_name) AS indexes_size, pg_total_relation_size(table_name) AS total_size FROM ( SELECT ('"' || table_schema || '"."' || table_name || '"') AS table_name FROM information_schema.tables ) AS all_tables where all_tables.table_name like '%TABLENAME%' ORDER BY total_size DESC ) AS pretty_sizes

-- 对于分区表，需要利用分区表的前缀进行统计
SELECT short_name,
pg_size_pretty(SUM(table_size)) AS table_size,
pg_size_pretty(SUM(indexes_size)) AS indexes_size,
pg_size_pretty(SUM(total_size)) AS total_size
FROM
(
SELECT
TABLE_NAME,
SUBSTRING("table_name",1,45) AS short_name,  -- SUBSTRING方式进行分区表表名分组
pg_table_size(TABLE_NAME) AS table_size,
pg_indexes_size(TABLE_NAME) AS indexes_size,
pg_total_relation_size(TABLE_NAME) AS total_size
FROM (
SELECT ('"' || table_schema || '"."' || TABLE_NAME || '"') AS TABLE_NAME
FROM information_schema.tables
) AS all_tables
WHERE all_tables.table_name LIKE '%TABLENAME_PREFIX%'  -- TABLENAME_PREFIX分区表前缀
) AS size_table
GROUP BY short_name

-- 对于分区表，需要利用分区表的前缀进行统计 SELECT short_name, pg_size_pretty(sum(table_size)) AS table_size, pg_size_pretty(sum(indexes_size)) AS indexes_size, pg_size_pretty(sum(total_size)) AS total_size FROM ( SELECT table_name, SUBSTRING("table_name",1,45) as short_name, -- SUBSTRING方式进行分区表表名分组 pg_table_size(table_name) AS table_size, pg_indexes_size(table_name) AS indexes_size, pg_total_relation_size(table_name) AS total_size FROM ( SELECT ('"' || table_schema || '"."' || table_name || '"') AS table_name FROM information_schema.tables ) AS all_tables where all_tables.table_name like '%TABLENAME_PREFIX%' -- TABLENAME_PREFIX分区表前缀 ) as size_table GROUP BY short_name