In our enviroment, we choose the second. After cached the table, oracle will be very smart to know that it should read the table from memory instead of read from disk.
http://dbakevin.blogspot.ro/2012/02/serious-performance-issue-caused-by-11g.html
Video Demonstration of Retrieval (in RAG)
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I have created a Video Demo of the Retrieval for RAG, based on what I have
posted here blog posts.
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