Best elapsed time as the tuning objective for SELECT statement is normally useful for most situations, but for some online screens for many records display, good response time is very important for user experience. So, you should consider using response time as the tuning objective for this kind of applications.
You should capture the most representative SQL workload that created performance problem in your system. For example, if there was a performance problem at 11:00 AM yesterday, you should extract this SQL workload from AWR for index recommendation.
If you cannot find better alternatives at the current Intelligent Level, you can increase the Intelligent Level or disable the “Disregard SQL alternatives with cost > 50 times of Original SQL” to try more Hints permutation for your SQL statement.
Yes, you can turn on SQL Plan Baselines in Deploy Plan page in Options window, but we recommend using SQL Patches without the SQL Plan Baselines’ hints application’s limitations.
You can evaluate the efficiency of the recommended indexes to your SQL workload to select most effective indexes for your database, but we recommend you to decrease the size of “Maximum number of recommended indexes” to let our AI engine to recommend a new set of indexes with less number of indexes.
No, the SELECT portion’s execution plan may be different when it is executed with the INSERT operation. We recommend to tune whole INSERT statement without splitting it into pieces.
There have been already a lot of SQL tuning products in the market providing better query plan visualization, better statistics analysis, high cost query plan steps indication, or even rule-of-thumb syntax recommendations. All in all, those tools are not helpful if users don’t have in-depth SQL tuning knowledge and are not willing to spend extra effort to tune a SQL apart from their daily duties. Users are eager for one-button-solution tool that can tune a SQL statement automatically without the need of users’ intervention. Tosska SQL Tuning Expert Pro is an innovative product that can accept a bad performance SQL statement and give a better solution just by users’ multiple easy points and clicks.
Developers are used to tuning SQL statements by rewriting or applying hints to the SQL text to influence database SQL optimizer to generate a better query plan for the SQL statement. A tuned SQL statement must be placed back to the program source and necessary testing has to be carried out before software deployment. It is a time-consuming and error-prone process. With Tosska SQL tuning technology, users can streamline their SQL tuning process in one product without the need to touch their programs’ source code. Our Automatic Hints Injection process will help user to find potential better query plans. The speed of original SQL statement will be improved automatically after deploying the SQL Patch with the original SQL text. Oracle SQL optimizer will use the new plan of the deployed SQL patch next time while receiving the same SQL statement. Therefore, users do not have to modify their program sources to solve the SQL performance problems.
Tosska SQL tuning uses our proprietary Auto-Hints-Injection technology to highly explore a given SQL statement’s potential execution plans that the Oracle SQL optimizer cannot archive within a limited timeframe. Furthermore, our technology is not limited by unreliable cost estimation algorithm, blinding SQL syntax restructure or any misleading human rule-of-thumb assumptions, since all those methods may not be valid in various database environments. We believe that every database is unique and there is no single rule which can improve a SQL across the board.
Although Oracle has the most sophisticated SQL optimizer, there are no guarantees that all SQL statements can be running up to the users’ expected performance. It is just like other databases in the market; Oracle knows the limitations of their database SQL optimizer. Therefore, they provide more than a hundred of Optimizer Hints to help users to tune bad performance SQL statements manually. To effective use those hints to tune a SQL statement is a difficult task even for experienced SQL developers, as they have to understand the SQL’s execution plan, SQL syntax and how those applied hints are affecting the execution plan generated by Oracle SQL optimizer. There are not many experts in the market that can master this technique to compose compatible Hints and create SQL Patches for complex SQL statements.
Tosska SQL Tuning Expert Pro is the only powerful tool that can automatically compose Hints and create SQL Patches to optimize a SQL statement without touching your program source code. The optimization solutions provided by the product normally can outperform most of human experts in the market.
Below are the Products Features Comparison between Tosska SQL Tuning Expert Pro (TSE Pro™) and Tosska SQL Tuning Expert (TSE™) :
|Modules||Tosska SQL Tuning Expert Pro (TSE Pro™)||Tosska SQL Tuning Expert (TSE™)|
|Tune SQL – Hints Injection||Yes||Yes|
|Tune SQL – Deploy Plan||Yes||No|
|Manage SQL Patches||Yes||No|
|Manage Plan Baselines||Yes||No|