How complex is the query? Can you send out the sql and/or the explain plan?
Are there just tables in the from(s) or are there also views. Also are there
any function calls? Are you seeing different performance on the same exact
query or are you changing any of the literals?
Ken
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of Stauffer, Bob
Sent: Wednesday, January 18, 2017 1:28 PM
To: 'oracle-l@xxxxxxxxxxxxx' <oracle-l@xxxxxxxxxxxxx>
Subject: inconsistent query performance
Hi all,
Oracle RDBMS EE 11.2.0.4.0 - 64bit
Red Hat Enterprise Linux 5.11
Any suggestions on how I can troubleshoot a query that performs
inconsistently? Sometimes it takes a minute to run and sometimes it takes
over an hour. It generally uses one of two explain plans - one fast and one
slow. Although it sometimes uses a different plan. I've checked the stats
and they are up to date. I generally run it in TOAD, but the same problem
occurs in SQLPlus, SQL Developer, and other interfaces. It doesn't matter
whether the system is busy or quiet. And it happens within the same session
- I can run it one right after another and it will change the plan for each
execution.
Any help would be appreciated. I'm a little rusty with Oracle.
Thanks much.
Bob Stauffer
DBA/Database Developer
***CONFIDENTIALITY NOTICE***This email contains confidential information
which may also be legally privileged and which is intended only for the use
of the recipient(s) named above. If you are not the intended recipient, you
are hereby notified that forwarding or copying of this email, or the taking
of any action in reliance on its contents, may be strictly prohibited. If
you have received this email in error, please notify us immediately by reply
email and delete this message from your inbox. Thank you. E-Mail Opt Out
Notice: This e-mail message may include an advertisement. You have the right
to request that we not send future advertisements to you at this e-mail
address. If you prefer not to receive future advertisements from us at this
e-mail address, please access the following url http://www.optoutffc.com/
Fulton Financial Corporation, P.O. Box 4887, Lancaster, Pa. 17604
