VACUUM [ ( { FULL | FREEZE | VERBOSE | ANALYZE } [, ...] ) ] [ table_name [ (column_name [, ...] ) ] ] VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] [ table_name ] VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] ANALYZE [ table_name [ (column_name [, ...] ) ] ] ...
VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] [ table ] VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] ANALYZE [ table [ (column [, ...] ) ] ] postgresql中执行delete操作后,表中的记录只是被标示为删除状态,并没有释放空间,在以后的update或insert操作中该部分的空间是不能够被重用的。经过vacuum清理后...
vacuum full本质上是创建了一张新的表,会创建该表的一个新拷贝,并且在操作完成之前都不会释放旧的...
postgres=# VACUUM FULL customer_par PARTITION (P1); VACUUM (2)使用ANALYZE语句更新统计信息。例如: postgres=# ANALYZE customer; ANALYZE (3)使用ANALYZE VERBOSE语句更新统计信息,并输出表的相关信息。例如: postgres=# ANALYZE VERBOSE customer; ANALYZE 也可以同时执行VACUUM ANALYZE命令进行查询优化。例如: post...
I tried running VACUUM(FULL, ANALYZE, VERBOSE) schema.tablename and let it run for 24 hours last weekend, but had to cancel it to get the server back online. I'm running it again this weekend, after deleting the indexes (I'm hoping that will speed it up so it will finish). So ...
VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] ANALYZE [ table_name [ (column_name [, ...] ) ] ] 1. 2. 3. VACUUM有两种:标准VACUUM和VACUUM FULL。 标准VACUUM基本可以online操作(DML运行正常,但不能执行ALTER TABLE),但能回收的磁盘空间很少。
VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] [table] VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] ANALYZE [table[ (column[, ...] ) ] ] DESCRIPTION 描述 VACUUM回收已删除元组占据的存储空间。 在一般的 PostgreSQL 操作里, 那些已经 DELETE 的元组或者被 UPDATE 过后过时的元组是没有从它们所属的表中...
PS:这是我使用的选项VACUUM (FULL, VERBOSE, ANALYZE, INDEX_CLEANUP) Lau*_*lbe5 如果VACUUM (FULL)失败,它所占用的所有磁盘空间将被释放。 该规则的例外情况是服务器在VACUUM (FULL)运行时崩溃(如果磁盘空间不足,则可能会发生这种情况)。崩溃(和崩溃恢复)后,孤立的文件可能会留在磁盘上。没有简单的方法可以...
postgres=# VACUUM FULL customer; VACUUM 例如,对表分区执行VACUUM操作: postgres=# VACUUM FULL customer_par PARTITION (P1); VACUUM (2)使用ANALYZE语句更新统计信息。例如: postgres=# ANALYZE customer; ANALYZE (3)使用ANALYZE VERBOSE语句更新统计信息,并输出表的相关信息。例如: ...
VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] [ ANALYZE ] [ _`table_and_columns`_ [, ...] ] where _`option`_ can be one of: FULL [ _`boolean`_ ] FREEZE [ _`boolean`_ ] VERBOSE [ _`boolean`_ ] ANALYZE [ _`boolean`_ ] ...