SQL Optimizer for DB2 LUW 4.3.1

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 for all executed sorts.
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.

Statistics: Executing SQL

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.

Add Inspector

Quest SQL Optimizer for IBM® DB2® LUWmaximizes 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, or SQL statements captured by the DB2 Event Monitor. 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)

Index Impact Analyzer

Index Usage Analyzer