IF: High Undo Tablespace Space Usage Without any Active Transactions (文档 ID 1951404.1) IF: High Undo Tablespace Space Usage due to Active Transactions (文档 ID 1951403.1) Undo Remains Unexpired When Using Non-a
SQL>ALTERTABLESPACE users RETENTION GUARANTEE;ALTERTABLESPACE users RETENTION GUARANTEE*ERRORatline1: ORA-30044:'Retention'canonlyspecifiedforundo tablespace 临时Undo 临时表也有undo信息,临时表的更改很频繁,将undo存在临时表中可以提升性能,主要是因为临时表空间中的更改不进行redo log的写入。 临时Undo的好处 减...
To check the free space of a tablespace in Oracle, we can query two views (DBA_DATA_FILES & DBA_SEGMENTS). SELECT DFQ.TABLESPACE_NAME "Tablespace Name" ,DFQ.TOTALSPACE "Total Size MB" , (DFQ.TOTALSPACE - DSQ.TOTALUSEDSPACE) "Free Space MB" ,ROUND (100 * ( (DFQ.TOTALSPACE - DSQ...
create undo tablespace undotbs2 datafile 'D:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL\UNDOTBS02.DBF' size 10m reuse autoextend on next 100m maxsize unlimited; --注意:在OPEN状态下某些时刻只能用一个UNDO表空间,如果要用新建的表空间,必须切换到该表空间: ALTER SYSTEM SET undo_tablespace=undo2; --修改...
TABLESPACE usersDATAFILE '/u01/app/oracle/oradata/mydatabase/users01.dbf'SIZE 500MAUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITEDDEFAULT TEMPORARY TABLESPACE temptempTEMPFILE '/u01/app/oracle/oradata/mydatabase/temp01.dbf'SIZE 20MAUTOEXTEND ON NEXT 640K MAXSIZE UNLIMITEDUNDO TABLESPACE undo...
select tablespace_name from dba_tablespaces; select tablespace_namefrom dba_tablespaces where tablespace_name not in ('SYSTEM','SYSAUX','USERS','UNDOTBS1') and contents not in ('TEMPORARY') 查询表空间和物理文件的对应关系 select file_name,tablespace_name,bytes from dba_data_files order by tabl...
ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS1' I increase the size tothe existing datafile to maxsize 32GB (cannot make it bigger than 32GB), it continues for a while but UNDO is full again. Then I add more data files. RIght now, the UNDOTBS1 has more spac...
In Oracle 9i, Oracle introduced the UNDO tablespace concept, which replaces the rollback segment. To prevent the "snapshot too old" error in Oracle 9i, it is recommended that you: Create an UNDO tablespace with an appropriate amount of free space. ...
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