POSTGRESQL 查看数据库 数据表大小

1、查看数据库大小：

select pg_database_size('log_analysis');

select pg_database_size('log_analysis');

 pg_database_size
------------------

( row)

2、select pg_database.datname, pg_size_pretty (pg_database_size(pg_database.datname)) AS size from pg_database;

log_analysis=# select pg_database.datname, pg_size_pretty (pg_database_size(pg_database.datname)) AS size from pg_database; 

   datname    |  size
--------------+---------
 template1    |  kB
 template0    |  kB
 postgres     |  kB
 b2c_product  |  GB
 spider       |  MB
 crm          |  MB
 log_analysis |  MB
( rows)

log_analysis=# 

3、按顺序查看索引

select indexrelname, pg_size_pretty(pg_relation_size(relid)) from pg_stat_user_indexes where schemaname='public' order by pg_relation_size(relid) desc;

log_analysis=# select indexrelname, pg_size_pretty(pg_relation_size(relid)) from pg_stat_user_indexes where schemaname='public' order by pg_relation_size(relid) desc;

                        indexrelname                        | pg_size_pretty
------------------------------------------------------------+----------------
 pk_dim_sight_area                                          |  kB
 idx_area_dim_sight_area                                    |  kB
 idx_city_dim_sight_area                                    |  kB
 idx_country_dim_sight_area                                 |  kB
 idx_region_dim_sight_area                                  |  kB
 pk_dim_page_type                                           |  bytes
 cpc_supplier_sight_daily_pkey                              |  bytes

4、查看所有表的大小

select relname, pg_size_pretty(pg_relation_size(relid)) from pg_stat_user_tables where schemaname='public' order by pg_relation_size(relid) desc;

log_analysis=# select relname, pg_size_pretty(pg_relation_size(relid)) from pg_stat_user_tables where schemaname='public' order by pg_relation_size(relid) desc;

                    relname                     | pg_size_pretty
------------------------------------------------+----------------
 dim_sight_area                                 |  kB
 dim_page_type                                  |  bytes
 wirelessapi_log_2014_08_08                     |  bytes
 trace_log_2014_08_04                           |  bytes
 dm_mobile                                      |  bytes
 trace_log_2014_07_14                           |  bytes