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Oracle Database Memory ParametersProgram Global Area(PGA)Automatic PGA memory management is enabled by default.Using the V$PARAMETER ViewSQL> show parameter sga_target;NAME TYPE VALUE------------------------------------ ----------- -----------------------------... 阅读全文
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参考文章:http://www.ningoo.net/html/2007/oracle11g_new_feature_flashback_data_archive2.html一.后台进程Oracle11g为Flashback data archive特性专门引入了一个新的后台进程FBDA,用于将追踪表(traced table,也就是将指定使用flashback data archive的table)的历史变化数据转存到闪回归档区。NING@11g>select name,description from v$bgprocess where name=’FBDA’;NAME DESCRI 阅读全文
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SQL> drop table t;drop table t *ERROR at line 1:ORA-55610: Invalid DDL statement on history-tracked table情况分析置于Flashback data archive中的table的一些限制追踪表(Tracked table),也就是指定将历史数据保存到某个flashback data archive中的table,不能执行DDL操作(add column除外)。NING@11g>drop table test;drop table test*ERROR at line 1:... 阅读全文
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C:\Users\MaryHu>exp ARCER/ARCER@DB234 FILE=E:\FGPS_20130528.dmp statistics=noneExport: Release 11.2.0.1.0 - Production on Tue May 28 08:04:54 2013Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 6 阅读全文