In the Oracle performance statement analysis category, you will find numerous queries to identify statements that consume the most machine resources.
In addition, there are queries to extract the code of a specific SID or SQL_ID.
Finally, you can find statements to execute the EXPLAIN PLAN of an extracted query and analyze the performance of Oracle statements.
When a statement is executed, Oracle’s optimizer assigns a data access plan based on the collected statistics, which is the most performant plan.
This allows for the fastest possible data retrieval.
However, it may happen that the data access plan is updated incorrectly for various reasons. This can cause a significant degradation in the statement’s performance.
Don’t panic!
In the Oracle Performance Analysis Statements category, you will find queries to identify statements that have changed their data access.
In addition, there are queries to extract the code of a specific SID or SQL_ID.
Finally, you can find how to execute the EXPLAIN PLAN of an extracted query and analyze the performance of Oracle statements.
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With the Query article to check if the data access plan has changed – PLAN_HASH_VALUE, we have the ability to identify the SQL_ID, the PLAN_HASH_VALUE, and the usage of machine resources with timing and the number of executions of a specific SQL_ID. Furthermore, if we observe that the PLAN_HASH_VALUE has Read more…
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