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SQL Optimizer for DB2 LUW 4.4.1 - Release Notes

Statistics: Executed SQL

Each executed 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 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.

 

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