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In-depth observation of Oracle data block nestedloop reading behavior

Source: Internet
Author: User
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In the previous article, we wrote a 10020event event to track the process of reading bufferget from oracle. Through this event, we can further study the reading behavior of data blocks connected by nestedloop and hashjoin. In the following experiment, two tables are created. Table T1 is large enough, and table T2 is compared.

In the previous article, we wrote a 10020 event to track the process of oracle reading buffer get. Through this event, we can further study the data block reading behavior of the nested loop and hash join connections. In the following experiment, two tables are created. Table T1 is large enough, and table T2 is compared.

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