先选中某个数据库 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, pg_table_size(table_name) AS table_size, pg_indexes_size(table_name) AS indexes_size, pg_...
tina=> select relname,relkind,relpages,pg_size_pretty(pg_relation_size(a.oid)),reltablespace,relowner from pg_class a, pg_tablespace tb where a.relkind in('r','i') and a.reltablespace >1664 order by a.relpages desc; relname | relkind | relpages | pg_size_pretty | reltablespace...
1. 查看数据库大小 selectpg_size_pretty(pg_database_size('database')); 2. 查看表大小 selectpg_table_size('table');
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 ORDER BY t...
updatevarchar_tablesetID='1';selectpg_table_size('varchar_table');--结果为57344 验证了小伙伴的问题,只不过我们用的不是json字段是varchar字段,但他会同样出现。说明这个和字段无关。 第5步:试试delete或truncate deletefromvarchar_table;selectpg_table_size('varchar_table');--结果为16384truncatetablevar...
allow_system_table_mods,off,允许修改系统表的结构 application_name,pgAdmin 4 - CONN:5982631,设置要在统计信息和日志中报告的应用程序名称。 archive_command,./archivelog %p,设置将被调用以存档WAL文件的shell命令 archive_mode,on,允许使用“存档”命令存档WAL文件 ...
pg_size_pretty(relpages::bigint*8*1024) AS size FROM pg_catalog.pg_class ORDER BY relpages DESC; objecttype: r 表示普通表 i 表示索引 t 表示toast(The Oversized-Attribute Storage Technique)行外存储表 更多... Table 51.11. pg_class Columns relkind ...
postgresql中,每个表对应一个单独的文件,文件名以oid命名,超过文件大小限制后,加后缀.1,.2等,同时还有以oid为前缀的fsm和vm文件。truncate后,文件名会变,oid不变。 postgres=# select oid from pg_class wh…
为了做到这一点,将表分解为"段"文件,每个文件都比操作系统文件大小限制要小,段大小由pg_config.h中的RELSEG_SIZE控制,一般是1G,或者通过pg_controldata查看:Blocks per segment of large relation: 131072。在磁盘上,表必须由连续编号的段文件组成,段文件可以是以下形式:...
CREATE FUNCTION rowcount_all(schema_name text default 'public') RETURNS table(table_name text, cnt bigint) as $$ declare table_name text; begin for table_name in SELECT c.relname FROM pg_class c JOIN pg_namespace s ON (c.relnamespace=s.oid) WHERE c.relkind = 'r' AND s.nspname...