Java execution in database

Question

Dear all,
We are using workflow 2.6.4 with oracle db 11g. Currently we are facing performance issues with the same..ADDM reports recommends the below
Recommendation 1: SQL Tuning
   Estimated benefit is .58 active sessions, 29.74% of total activity.
   Action
      Tune the PL/SQL block with SQL_ID "6bd4fvsx8n42v". Refer to the "Tuning
      PL/SQL Applications" chapter of Oracle's "PL/SQL User's Guide and
      Reference".
      Related Object
         SQL statement with SQL_ID 6bd4fvsx8n42v.
         DECLARE job BINARY_INTEGER := :job; next_date DATE := :mydate;
         broken BOOLEAN := FALSE; BEGIN OWF_MGR.START_ODS_REFRESH(SYSDATE );
         :mydate := next_date; IF broken THEN :b := 1; ELSE :b := 0; END IF;
         END;
   Rationale
      SQL statement with SQL_ID "6bd4fvsx8n42v" was executed 1 times and had
      an average elapsed time of 31934 seconds.
   Rationale
      Average time spent in Java execution was 24904 seconds.
CREATE OR REPLACE PROCEDURE OWF_MGR.START_ODS_REFRESH ( pSysdate in date ) is
    ItemType constant varchar2(30) := 'TABSRPT';
    WorkflowProcess constant varchar2(30) := 'ODS_REFRESH';
    ItemKey varchar2(30);
    ItemUserKey varchar2(80);
    l_Sysdate Date;
    begin
        if ( pSysdate is null ) then
            l_Sysdate:= sysdate;
        else
            l_Sysdate:= pSysdate;
        end if;
        --select ODS_REFRESH_SEQ.nextval into ItemKey from dual ;
    --    ItemKey:= to_char(l_Sysdate,'yyyy') || '-' || to_char(l_Sysdate,'mm') || '-' || to_char(l_Sysdate,'dd');
    ItemKey:= 'NEW_REF' || to_char(l_Sysdate,'yyyy') || '-' || to_char(l_Sysdate,'mm') || '-' || to_char(l_Sysdate,'dd');
        ItemUserKey:= to_char(l_Sysdate,'yyyy') || '-' || to_char(l_Sysdate,'mm') || '-' || to_char(l_Sysdate,'dd');
        wf_engine.CreateProcess (itemtype => ItemType,
                                 itemkey  => ItemKey,
                                 process  => WorkflowProcess );
        wf_engine.SetItemUserKey (itemtype => itemtype,
                                  itemkey  => itemkey,
                                  userkey => ItemUserKey);
        wf_engine.SetItemAttrDate (itemtype => itemtype,
                                   itemkey => itemkey,
                                   aname => 'PSYSDATE',
                                   avalue => l_Sysdate);
        wf_engine.StartProcess (itemtype => itemtype,
                                itemkey  => itemkey );
    exception
        when others then
            wf_core.context(null,'ODS_REFRESH',ItemKey,null,'owf_mgr',null,Workflowprocess);
            raise;
end START_ODS_REFRESH;
/now, the question is :
a) is there any parameters in the database that I have to tune in order to increase the performance ?
b) where should I focus in the database or in the workflow engine ?
Please guide
Kai

Answer 1

a) Tom Kyte has recommended setting the initialization parameter FAST=TRUE.
b) With the basics
Did you use the SQL_ID to find the statement referred to? Did you explain plan it? Post the DBMS_XPLAN.DISPLAY report
http://www.morganslibrary.org/reference/explain_plan.html
If you focus on the workflow engine do you have any control over what is written and what it submitted? If not then it is
not the place to focus.
What you need is a methodology. I would suggest this is a good place to start"
http://www.amazon.com/Optimizing-Oracle-Performance-Cary-Millsap/dp/059600527X