The job of the Optimizer is to determine the best execution plan for each SQL statement.
Performance tuning in Oracle databases includes optimizing SQL statements and query execution plans so that the requests can be completed more efficiently.
Problems like poorly optimized SQL statements force the database to work much harder to retrieve information (resulting in more system resources being used). The more system resources that are used the greater the chance it will affect the experience of users on connected applications.
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31 дек 2023
