摘抄
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Rman backup retention policy
There are two mutually exclusive options for implementing a retention policy: redundancy and recovery window. If no retention policy is configured by the user, then the REPORT OBSOLETE andDELETE OBSOL...
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explain plan
http://www.start0.net/blog/post/304.html explain
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Oracle Memory Structures
Oracle 在内存中存储以下信息： 1.程序代码 2.已连接的会话（session）信息，包括当前活动的（active）及非活...
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rebuild index online or offline
When you rebuild index online,- it will do a full tablescan on the base table.- At the same time it will maintain a journal table for DML data, which has changed during this index rebuilding operation...
