Performance perspective

The commands in the Performance perspective enable you to analyze SQL statements, perform What-If comparisons, and migrate access path statistics for an object.

Selecting a SQL statement for analysis (see Selecting a statement for SQL Analysis) displays the Performance perspective.

The Performance perspective provides access to the result view tabs, which enable you to perform the tuning process. Depending on the activities being performed, the following tabs can be displayed:

SQL tab
Indexes tab
Explain tab
Cost tab
Predicates tab
Compare tab (available in the Classic console only)
Related Objects tab (available in the Classic console only)
Output tab/Results tab

#	Description
1	Tuning session pane
2	Buttons for adding SQL statement views and removing views
3	Active workspace name An asterisk (*) indicates that the workspace has unsaved changes.
4	Perspective tabs The Performance tab is underlined with orange, indicating that it is the active tab.
5	Generate Explain plan button The button is disabled (dimmed) after the statement is successfully explained.
6	What-If button The What-If button is disabled (dimmed) on a selected statement if the statement has not been successfully explained. Unless the statement is successfully explained, you cannot create a What-If scenario based on that statement.
7	Compare button This button opens the Compare dialog.
8	Name and ID of the active statement
9	Run button This button executes the statement on the SQL tab and displays the output on the Results tab.
10	Explain tree of the SQL statement
11	Result view tabs that show the result of explaining a statement, and catalog objects
12	Explain timestamp and DB2 subsystem name
13	Options button

#	Description
1	Tuning session pane
2	Buttons for adding SQL statement views and removing views
3	Active workspace name An asterisk (*) indicates that the workspace has unsaved changes.
4	Perspective tabs The Performance tab is blue, indicating that it is the active tab.
5	Generate Explain plan button The button is dimmed after the statement is successfully explained.
6	What-If button The What-If button is disabled (dimmed) on a selected statement if the statement has not been successfully explained. Unless the statement is successfully explained, you cannot create a What-If scenario based on that statement.
7	Run button
8	Migrate statistics button This button lets you migrate access path statistics for one or more objects.
9	Name and ID of the active statement
10	(Compare tab only) Explain tree of the first statement Note indicates that at least one attribute of an object has different values in the two statements being compared.
11	The Result view tabs that show the result of explaining a statement, a compare, and catalog objects.
12	(Compare tab only) Explain tree of the second statement
13	Explain timestamp and DB2 subsystem name
14	Options button
15	(Compare tab only) Attribute details of the second statement
16	(Compare tab only) Attribute details of the first statement
17	(Compare tab only) Attribute names Note indicates that the attribute has different values in the two statements being compared.

This section provides more information about the following topics:

Related topic

Tuning SQL

Performance perspective

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