Chart Tab
Charts are available for all the statistics and run times. The Charts tab of the Run Time pane in the Index Advisor window displays two chart panes showing the run time information and statistics.
To change the information in the chart
Click the Chart Title and select one of the following functions:
| Function |
Description |
| Performance Projection |
A performance forecast based on the retrieved Estimated I/O Cost value. If the Performance Projection value is greater then 1, then it is forecasted that the recommended Index candidate may give a better performance. |
|
Estimated I/O cost
|
Charts the estimated I/0 cost from the SQL statement with the corresponding indexes. |
|
All Records
and
First Record
|
Elapsed Time |
Charts the execution time (in clock time) that it takes the SQL statement to select all records or the first record. |
|
Times of Improvement |
How many times faster the alternative SQL statement is compared to the original SQL statement. |
|
CPU Time |
Charts the execution time (in CPU time) that it takes the SQL statement to select all records or the first record. |
|
Actual I/O Cost |
Charts the Actual I/O Cost of executing the SQL statement from Adaptive Server |
|
Elapsed Time + CPU Time |
Charts side by side the Elapsed Time and the CPU Time. |
|
Writes |
Charts the accumulative number of disk writes for the SQL statement from the run time statistics. |
|
Scan Count |
Charts the accumulative number of scans for the SQL statement from the run time statistics |
|
Logical Reads |
Charts the accumulative number of logical reads for the SQL statement from the run time statistics |
|
Physical Reads |
Charts the accumulative number of physical reads for the SQL statement from the run time statistics. |
|
APF IOs used |
Charts the accumulative number of APF IOs (Asynchronous-PreFetch I/Os) for the SQL statement from the run time statistics. |
|
Other |
All Records |
Charts the Elapsed Time + CPU Time, Actual I/O Cost, and Times of Improvement for all records. |
|
First Record |
Charts the Elapsed Time + CPU Time, Actual I/O Cost, and Times of Improvement for the first record. |
|
All Records vs. First Record |
Charts the Elapsed Time for all records and the first record. |
|
All Records vs. First Record with Cost |
Charts the Estimated I/O Cost, the Elapsed Time + CPU Time (for all records), and Elapsed Time + CPU Time (for the first record). |
|
Print |
|
Prints the chart. |
|
Save |
|
Saves the selected chart. |
|
Hide Chart |
|
Hides the selected chart. |
Related Topics
Index Advisor Overview
Index Advisor Window
