Load an execution plan before viewing cost. For more information, see Loading and Viewing an Execution Plan.
The Actual Versus Estimated Cost window opens.Actual Versus Estimated Cost for Query ID
Column Name Description Step Step number in the query plan CPU Time CPU the step uses IO Count I/O the step uses StepStart Time Timestamp, to the nearest microsecond, when the step was sent to the AMP StepStop Time Timestamp, to the nearest microsecond, when the step returned from the AMP Elapsed Time Difference between StepStop Time and StepStart Time CPU Cost Estimated CPU time required to execute the step IO Cost Estimated I/O time required to execute the step Network Cost Estimated network time required to execute the step Total Cost Total estimated time required to execute the stepIf the query is not present in the DBQL, only the estimated cost appears. If the query is found, the actual and estimated stepwise costs appear.
[Optional] In the Actual vs. Estimated Cost window, double-click the column headings to change the sort order.
For example, double-click the CPU Cost column heading to list the steps with the highest cost estimates first.
To view the graphical layout of the stepwise costs, click View Graph.
Stepwise Cost Distribution Graph for Query ID