pg_size_pretty(pg_total_relation_size(c.oid)) AS total_size, -- 正常数据+索引+大字段数据+碎片空间(物理大小) pg_size_pretty(pg_relation_size(c.oid)) AS data_size, -- 正常数据 pg_size_pretty(pg_indexes_size(c.oid)) AS table_index_size -- 索引 FROM pg_class c JOIN pg_namespace...
SELECTpg_size_pretty(pg_indexes_size('your_table_name')); 1. 对于需要深入了解每个单独索引的情况,可以使用以下查询: SELECTindexrelid::regclassASindex_name,pg_size_pretty(pg_relation_size(indexrelid))ASindex_sizeFROMpg_indexWHEREindrelid='your_table_name'::regclass; 1. 2. 3. 4. 这个查询将...
pg_size_pretty --- 8192 bytes (1 row) postgres=# select pg_size_pretty(pg_total_relation_size('t')); pg_size_pretty --- 8192 bytes (1 row) 5. 索引大小(pg_indexes_size) postgres=# select pg_size_pretty(pg_indexes_size('t')); pg_size_pretty --- 0 bytes (1 row) 6. 当前...
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, pg_table_size(table_name) AS table_size, pg_indexes_size(table_name) AS indexes_size, pg_total_relation_size(table_name) AS t...
z1 = 'select pg_indexes_size(\'' z2 = '\');' #print(z1+table+z2) cur.execute(z1+table+z2) rows = cur.fetchall() size = 0 for row in rows: size = int(row[0]) + size print('表索引大小合计') print(str(size) + ' byte') ...
GIN:GIN 代表广义倒排索引(generalized inverted indexes),主要用于单个字段中包含多个值的数据,例如 hstore、 array、 jsonb 以及 range 数据类型。一个倒排索引为每个元素值都创建一个单独的索引项,可以有效地查询某个特定元素值是否存在。Google、百度这种搜索引擎利用的就是倒排索引。
CREATE INDEX idx_real ON my_complex (((value).r)); \d my_complex; Table "public.my_complex" Column | Type | Collation | Nullable | Default ---+---+---+---+--- name | text | | | value | complex | | | Indexes: "idx_real" btree (((value).r)) CREATE INDEX idx_complex...
pg_size_pretty(pg_total_relation_size('tablename')); --查看所有 schema里面索引大小，大到小的顺序排列：select indexrelname,pg_size_pretty( pg_relation_size(relid))from pg_stat_user_indexes where schemaname = 'schemaname' order by pg_relation_size(relid) desc;...
[Mon Sep 30 07:34:44 2024] (old:public.pgtest01) Processing results: 2803 pages left (3633 pages including toasts and indexes), size reduced by 14.602MB (18.898MB including toasts and indexes) in total. [Mon Sep 30 07:34:44 2024] (old) Processing complete. [Mon Sep 30 07:34:44 ...
pg_total_relation_size('"' || table_schema || '"."' || table_name || '"')DESC limit 20 按照size⼤⼩分别列出所有表的table和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 ...