Use the Capture
SQL from Statement Cache page
of the workflow assistant for query tuning to find and select an SQL
statement from the dynamic statement cache. You can then analyze the
statement, tune it, or both.
About this task
The dynamic statement cache caches all dynamic SQL statements
that run on the subsystem. When IFCID 0318 is enabled, the dynamic
statement cache also retains performance data about the cached SQL
statements.
Procedure
To capture an SQL statement
from the dynamic statement
cache:
- In the Data Source Explorer, right-click
the database on
which the statement cache is located.
- Select . The
workflow assistant for query tuning opens to the Capture section.
- On the left side of the workflow assistant, select Statement
Cache under DB2 for z/OS Sources.
- Create a filter, or select an existing one, that sets criteria
for how to find the SQL statement that you want.
- Click Capture. After
you capture SQL statements that match the criteria, the Captured
Statements section opens. The captured SQL statements
appear in a table in this section. You can sort the statements by
clicking the column headers in the table.
- Right-click the statement
that you want to analyze and tune, and select Invoke Advisors
and Tools.
The workflow assistant
for query tuning opens to the Run Single-Query Advisors
and Analysis Tools page of the Invoke section.
The statement appears in the Query Text field. Run
advisors and tools on the statement. For help on the Run
Single-Query Advisors and Analysis Tools page, click the
button
at the top of the page or in the two sections. You can also click
at the top of the page or in a section and then press F1.