select pg_size_pretty(pg_total_relation_size('tab')) as size; -- 查询所有表的总大小,包括其索引大小 select relname, pg_size_pretty(pg_total_relation_size(relid)) as size from pg_stat_user_tables; 查询索引大小(暂时没有一次性查询所有索引大小的函数) -- 查询单个索引大小 select pg_size_...
SELECT pg_size_pretty(pg_relation_size('Employee_table')); 6.postgresql数据库的单个索引大小: SELECT pg_size_pretty(pg_indexes_size('index_empid')); 7. 查找 postgresql 表空间大小 以下语句返回表空间的大小 SELECT pg_size_pretty (pg_tablespace_size ('tablespace_name')); 8. 获取 Postgres 中...
pg_stat_all_indexes 这个表是展示postgresql 的表的索引的状态.查询无用的索引的 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SELECTrelname,indexrelname,idx_scan,idx_tup_read,idx_tup_fetch,pg_size_pretty(pg_relation_size(indexrelname::regclass))assizeFROMpg_stat_all_indexesWHEREschemaname='pu...
SELECTrelnameASTABLE_NAME,pg_size_pretty(pg_relation_size(schemaname||'.'||relname))AStable_size,n_dead_tup,n_live_tup,(n_dead_tup*100/(n_live_tup+n_dead_tup))ASdead_tup_ratioFROMpg_stat_user_tablesWHEREn_dead_tup<>0order by5descLIMIT10; 查看数据库用户连接数 代码语言:javascript 代...
SELECT table_schema || '.' || table_name AS table_full_name, pg_size_pretty(pg_total_relation_size('"' || table_schema || '"."' || table_name || '"')) AS size FROM information_schema.tables ORDER BY pg_total_relation_size('"' || table_schema || '"."' || table_name ...
select relname, pg_size_pretty(pg_relation_size(oid)) finsertrom pg_class where relname like 't\_%' or relname='t1' order by relname; 3)查看索引支持的类型 select opfname from pg_opfamily, pg_am where opfmethod = pg_am.oid and amname='btree' order by 1; 4)查看所有支持的操作符...
pg_relation_size(relid)/1024/1024 as "size_Mb", to_char(r.reltuples,'999999999999999999999') as "table_cnt" from pg_stat_user_tables t inner join pg_namespace n on t.schemaname = n.nspname inner join pg_class r on r.relname = t.relname ...
1 1.在postgresql数据库中默认情况下可通过pg_database_size函数加数据库名称的方式来查看数据库的大小 2 2.在pg_database表中记录着所有数据库的信息，也可以查看这个表的信息来查看所有数据库的大小 3 3.另外通过pg_size_pretty函数可以查看数据库的大小以kb mb gb的方式 4 4.通过pg_relation_size函数可以...
3中方法,不论什么一个都行 方法一 ,查一个表select pg_size_pretty(pg_relation_size('table_name')); 方法二 ,查出全部表并按大小排序 SELECT table_schema || '.' || table_name AS table_full_name, pg_size_pretty(pg_total_rel 知识
schemaname = 'public' order by pg_relation_size(indexrelname) desc; 二、查看所有public schema里面表的大小,从大到小顺序排里 select relname, pg_size_pretty(pg_relation_size(relname)) from pg_stat_user_tables where schemaname = 'public' order by pg_relation_size(relname) desc; ...