Step 3.Set the values for db_recovery_file_dest and db_recovery_file_dest_size (flash recovery area parameters).(配置闪回区域参数) Flashback logs increase FRA usage significantly. It would behoove you to at least double the given size of the FRA. 因此具体参数带该如下: SQL> ALTER SYSTEM S...
When you useFlashback Database to rewind a database to a past target time, the commanddetermines which blocks changed after the target time and restores them fromthe flashback logs. The database restores the version of each block that is immediatelyprior to the target time. The database then...
The database administratorusually calculates the space requirement. --创建一个合适的undo 表空间,如果update 操作频繁,那么就需要更多的空间。 (2)Enable AUM,as explained in OracleDatabase Administrator's Guide. Set these database initializationparameters: --启用AUM,相关的参数如下: 1)...
When you useFlashback Database to rewind a database to a past target time, the commanddetermines which blocks changed after the target time and restores themfromthe flashback logs. The database restores the version of each block that is immediatelyprior to the target time. The database then ...
2-4 iii 3 Administering Oracle ASM Instances Operating With Different Releases of Oracle ASM and Database Instances Simultaneously 3-1 Configuring Initialization Parameters for an Oracle ASM Instance ... 3-2 Initialization Parameter Files for an Oracle ASM Instance ... 3-3 Backing Up, Copying, ...
说明:字符集编码被改了的问题,查询Select * from NLS_DATABASE_PARAMETERS s where s.PARAMETER=’NLS_CHARACTERSET’;结果为UTF8,改回原来的字符集编码AL32UTF8。 注意:修改字符集只是修改了数据字典,并没有对数据进行字符集转换! ORA-06592: 编写CASE语句时,如果在when子句中没有包含必须的条件分支并且没有包含...
用于管理 ASM 实例的新的 SYSASM 角色、用于降低共享池使用的可变的区大小,以及实例能够读取磁盘组的特定磁盘,这些都是 Oracle Database 11gASM 中引入的一些重要新特性。 参见系列目录 SYSASM 角色 自动存储管理 (ASM) 是在 Oracle Database 10g中引入的,它在某种程度上打破了 DBA 和系统管理员之间在存储分配...
6.闪回数据库(Flashback Database):将数据库恢复到过去某个时间点或某个SCN值时的状态。 注意 ①闪回查询、闪回版本查询、闪回事务查询以及闪回表主要是基于撤销表空间中的回滚信息实现的; ②闪回删除是基于Oracle 10g中的回收站(Recycle Bin)特性实现的; ...
(fixed-width) font elements include parameters, privileges, datatypes, RMAN keywords, SQL keywords, SQL*Plus or utility commands, You can back up the database by using the BACKUP command. packages and methods, as well as Query the TABLE_NAME column in the USER_ system-supplied column names,...
SQL> show parameters enable_pluggable_database NAME TYPE VALUE --- --- --- enable_pluggable_database booleanTRUE La sentencia para crear un “Container Database” utilizando “Local Undo” es el siguiente: Copy Copied to Clipboard Error: Could not Copy SQL> CREATE...