postgresql 查看数据库,表,索引,表空间以及大小
发布时间:2020-12-13 18:11:59 所属栏目:百科 来源:网络整理
导读:转载自博客 http://blog.51yip.com/pgsql/1525.html 1,查看数据库 playboy= l //加上字母l,相当于mysql的,mysql show databases; List of databases Name | Owner | Encoding-----------+----------+---------- playboy | postgres | UTF8 postgres | pos
转载自博客 http://blog.51yip.com/pgsql/1525.html 1,查看数据库 playboy=> l //加上字母l,相当于mysql的,mysql> show databases; List of databases Name | Owner | Encoding -----------+----------+---------- playboy | postgres | UTF8 postgres | postgres | UTF8 template0 | postgres | UTF8 template1 | postgres | UTF8 playboy=> select pg_database_size('playboy'); //查看playboy数据库的大小 pg_database_size ------------------ 3637896 (1 row) playboy=> select pg_database.datname,pg_database_size(pg_database.datname) AS size from pg_database; //查看所有数据库的大小 datname | size -----------+--------- postgres | 3621512 playboy | 3637896 template1 | 3563524 template0 | 3563524 (4 rows) playboy=> select pg_size_pretty(pg_database_size('playboy')); //以KB,MB,GB的方式来查看数据库大小 pg_size_pretty ---------------- 3553 kB (1 row) 2,查看多表 playboy=> d test; //相当于mysql的,mysql> desc test; Table "public.test" Column | Type | Modifiers --------+-----------------------+----------- id | integer | not null name | character varying(32) | Indexes: "playboy_id_pk" PRIMARY KEY,btree (id) playboy=> select pg_relation_size('test'); //查看表大小 pg_relation_size ------------------ 0 (1 row) playboy=> select pg_size_pretty(pg_relation_size('test')); //以KB,MB,GB的方式来查看表大小 pg_size_pretty ---------------- 0 bytes (1 row) playboy=> select pg_size_pretty(pg_total_relation_size('test')); //查看表的总大小,包括索引大小 pg_size_pretty ---------------- 8192 bytes (1 row)3,查看单表 playboy=> d test; //相当于mysql的,mysql> desc test; Table "public.test" Column | Type | Modifiers --------+-----------------------+----------- id | integer | not null name | character varying(32) | Indexes: "playboy_id_pk" PRIMARY KEY,btree (id) playboy=> select pg_relation_size('test'); //查看表大小 pg_relation_size ------------------ 0 (1 row) playboy=> select pg_size_pretty(pg_relation_size('test')); //以KB,MB,GB的方式来查看表大小 pg_size_pretty ---------------- 0 bytes (1 row) playboy=> select pg_size_pretty(pg_total_relation_size('test')); //查看表的总大小,包括索引大小 pg_size_pretty ---------------- 8192 bytes (1 row) 4,查看索引 playboy=> di //相当于mysql的,mysql> show index from test; List of relations Schema | Name | Type | Owner | Table --------+---------------+-------+---------+------- public | playboy_id_pk | index | playboy | test (1 row) playboy=> select pg_size_pretty(pg_relation_size('playboy_id_pk')); //查看索大小 pg_size_pretty ---------------- 8192 bytes (1 row) 5,查看表空间,以及大小 playboy=> select spcname from pg_tablespace; //查看所有表空间 spcname ------------ pg_default pg_global (2 rows) playboy=> select pg_size_pretty(pg_tablespace_size('pg_default')); //查看表空间大小 pg_size_pretty ---------------- 14 MB (1 row) (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |