Change Tracking graphically shows at a glance when the plan has changed for the history of PLAN information.
We believe that the plan has changed in the following cases:
The plan_hash value of SQL previously collected for SQL at the time of lookup is different.
It is determined by inquiring if plan_hash has been changed for the entire collection data.
When displaying in the Change Trend chart, child_number is not included in the determination that it has changed
If the sql collected in the past is the plan_hash value based on the lookup point, it is marked as a dot in the Change Trend Chart. The PLAN is marked green for faster performance and red for slower performance.
Clicking on that point shows the information of that SQL in the SQL List, and drags to show the SQL List filtered by the x-value (date) and y-value (elapsed_time_sec_diff) of the selection.
PLAN Change List
Provide a variety of important information about SQL with Plan changes in the Change Trend.
Click sql_id to display the SQL Detail screen for that particular plan.
Click on the Elapsed_time DIFF to provide a screen that allows you to compare the Plan before and after the change.
Plan Faster / Slower TOP
Shows up to five faster and slower SQL changes in the lookup interval.