optimize oracle query

bibi92
bibi92 used Ask the Experts™
on
Hello,

How can I optimize the query insert into tr1234566_tmp_calc VALUES
         (:p1,:p2,:p3,:p4,:p5,:p6,:p7,:p8,:p9,:p10,:p11,:p12,:p13,:p14,:p15,:p
         16,:p17)  :
   Recommendation 1: SQL Tuning
   Estimated benefit is .28 active sessions, 10.88% of total activity.
   -------------------------------------------------------------------

         insert into tr1234566_tmp_calc VALUES
         (:p1,:p2,:p3,:p4,:p5,:p6,:p7,:p8,:p9,:p10,:p11,:p12,:p13,:p14,:p15,:p
         16,:p17)
   Rationale
      The SQL spent 98% of its database time on CPU, I/O and Cluster waits.
      This part of database time may be improved by the SQL Tuning Advisor.
   Rationale
      Database time for this SQL was divided as follows: 99% for SQL
      execution, 1% for parsing, 0% for PL/SQL execution and 0% for Java
      execution.
   Rationale
      SQL statement with SQL_ID "f79cfu8cpyg1b" was executed 464908 times and
      had an average elapsed time of 0.0063 seconds.

Thanks

bibi
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®

Commented:
Are you purely going by recommendations OR you are really experiencing performance issues with these insert statements?

Author

Commented:
by recommendation.
David VanZandtOracle Database Administrator III

Commented:
Off the top, inserts are commonly optimized with:
add the hint +APPEND so that writes at made at the high-water mark
parallelize the database writers
disable indexes for the load, and rebuild them after the commit
update the table statistics for the cost-based optimizer
find a compromise on how oftern you need to commit vs load on your redo log buffers
with a half-million rows, you are presumably scheduling this to a minimal-impact window (after hours)

As always, your actual results will vary.
Success in ‘20 With a Profitable Pricing Strategy

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden using our free interactive tool and use it to determine the right price for your IT services. Start calculating Now!

Mark GeerlingsDatabase Administrator

Commented:
Usually, inserts like this don't need any special tuning.  But, what is the time period for these half a million rows to be inserted?  What else is going on in the database at the time?  Can you combine these inserts to be multiple row inserts?  If yes, it may make sense to try the "append" hint.  But, there are some disadvantages to this approach.

Commented:
I suggest just don't follow recommendation unless you experience performance issue.  As suggested by other experts, Inserts do not need special tuning unless millions of records are being inserted.
Senior Oracle DBA
Commented:
I take this from you original post:

had an average elapsed time of 0.0063 seconds.

What do you expect to improve?

This is a bound statement and the plan is being repeatedly reused.  I don't see any problem with the statement at all.  It is showing up on a report because it exceeds a threshold, but the reason that it exceeds a threshold is that it has been run so many times.

Author

Commented:
Thanks regards bibi

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial