Subject: Why creation of sql profiles take forever

Question

I am on Oracle 10.2.0.4 on HP UNIX 11i. I am creating sql profiles using following logic. Sometimes sql profile is generated in 1-2 minutes. Many times , even after an hour, no sql profile is created and I get timeout errors . I increased time limit from 3600 (1 hr) to 7200 (2 hrs), still timeout error, why?
-- Tuning task created for specific a statement from the AWR.
DECLARE
l_sql_tune_task_id VARCHAR2(100);
BEGIN
l_sql_tune_task_id := DBMS_SQLTUNE.create_tuning_task ( sql_id => '$SQLSTMTID', scope =
DBMS_SQLTUNE.scope_comprehensive, time_limit => 3600, task_name => '${SQLSTMTID}_AWR_tuning_task', description => 'Tuning task for statement ${SQLSTMTID} in AWR.');
--DBMS_OUTPUT.put_line('l_sql_tune_task_id: ' || l_sql_tune_task_id);
END;
EXEC DBMS_SQLTUNE.execute_tuning_task(task_name => '${SQLSTMTID}_AWR_tuning_task');

Answer 1

Depending on the complexity of the statement and the underlying objects, the sql tuning advisor will have differing amounts of work to do working through "statistical checks, access path analysis, SQL structure analysis and sql profiling".
Perhaps see V$ADVISOR_PROGRESS?