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Managing the database buffer cache
1：首先Server Process根据Hash Function查询需要的块是否在Buffer中可用.如果可用Server Process将其置于LRU list的头部.这个过程叫做一个逻辑读. 因为没有实际发生OS级的IO.如果所需块没有在Buffer中找到,Server Process 将从数据文件中读取所需数据块.[@more@] 1：首先Server Process根据Hash Function查询需要的块是否在Buffer中可用.如果可用Server Process将其置于LRU list的头部.这个过程叫做一个逻辑读. 因为没有实际发生OS级的IO.如果所需块没有在Buffer中找到,Server Process 将从数据文件中读取所需数据块.2: Server Proces
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Transporting Tablespaces with Self-Contained
1 Be aware of the following limitations as you plan for transportable tablespace use: 1:The source and target database must be on the same hardware platform. For example, you can transport tablespaces between Sun Solaris Oracle databases, or you can transport tablespaces between Windows NT Oracle databases. However, you cannot transport a tablespace from a Sun Solaris Oracle database to an Windows NT Oracle database. 2:The source and target database must use the same character set a
