Each executing SQL statement has the following performance statistics:
| Statistics | Description |
| Executions | Number of times the statement has been executed. |
| Logical Reads | Number of data pages read from the buffer pool (logical). |
| Physical Reads | Number of data pages read from the buffer pool (physical). |
| CPU Time | CPU time used by the statement. |
| Compilations | Number of different compilations for a specific statement. |
| Worst Preparation Time | The longest number of milliseconds required to prepare a specific statement. |
| Best Preparation Time | The shortest number of milliseconds required to prepare a specific statement. |
| Rows Deleted | Number of attempted row deletions. |
| Rows Inserted | Number of attempted row insertions. |
| Rows Updated | Number of attempted row updates. |
| Rows Read | Number of rows read to return result set. |
| Rows Written | Number of rows in the table changed (inserted, deleted or updated). |
| Stmt Sorts | Number of times a set of data was sorted. |
| Sort Overflows | Number of sorts that may have required temporary disk space for storage after running out of sort heap. |
| Sort Time | Total number of milliseconds spend performing sorts when executing a section. |
| Total Execute Time | Total time spent to execute a particular statement in the SQL cache. |
| Stmt Text | Text of the statement |
| Partition | Database partition from which data was retrieved for the row. |
| Snapshot Time | Date and time of the snaphot. |
Quest SQL Optimizer for IBM® DB2® LUW maximizes SQL performance by automating the manual, time-intensive and uncertain process of ensuring that SQL statements are performing as fast as possible. SQL Optimizer analyzes, rewrites, and evaluates SQL statements within multiple database objects, files. With SQL Optimizer, you can analyze and optimize all your problem SQL from multiple sources. SQL Optimizer also provides you a complete index optimization and plan change analysis solution, from index recommendations to simulated index impact analysis, through comparison of multiple SQL access plans.
SQL Optimizer provides you with the following main modules.
SQL Optimizer (including SQL Rewrite and Generate Indexes functions)
To add an Inspector
Click 
The General Information page of the Add Inspector wizard consists of the following settings:
| Item | Description | |
|
Inspecting Approach |
Select from the following:
| |
|
Inspector name |
Enter a name for the Inspector. | |
|
Last Modified |
The date and time the Inspector was last modified. | |
|
Description |
Enter a description for the Inspector. | |
