It's oracle AQ internal query so cant change it. I have already tried it without the hint and it does use the index but again can't change the query. ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Monday, December 09, 2002 12:49 PM
> > Shaleen, > > The use of FIRST_ROWS hint with an order by clause is ridiculous. The hint > is ignored. > > Raj > > > > > > John Kanagaraj > <john.kanagara To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> > [EMAIL PROTECTED]> cc: > Sent by: Subject: RE: AQ query from dequeuw procedure not using index -URGENT > [EMAIL PROTECTED] > om > > > December 09, > 2002 02:49 PM > Please respond > to ORACLE-L > > > > > > > Shaleen, > > Have you considered using Outlines? > John Kanagaraj > Oracle Applications DBA > DBSoft Inc > (W): 408-970-7002 > > So WHO is the Reason for the Season?! Write me for details! > > ** The opinions and statements above are entirely my own and not those of > my > employer or clients ** > > > -----Original Message----- > Sent: Monday, December 09, 2002 10:04 AM > To: Multiple recipients of list ORACLE-L > > > All, > > We are using a third party application (Retek Warehouse management) which > uses AQ as communication mechanism between processes. The problem we are > facing is that the AQ query behind Dequeue is doing a full tablescan on > queue table which is causing about 5Billion logical reads/day and is > bringing the DB to its knees. > > Following is the query which I gleaned from tracing the process > > select /*+ FIRST_ROWS */ qt.rowid, qt.msgid, qt.corrid, qt.priority, > qt.delay, qt.expiration, qt.retry_count, qt.exception_qschema, > qt.exception_queue, qt.chain_no, qt.local_order_no, qt.enq_time, > qt.time_manager_info, qt.state, qt.enq_tid, qt.step_no from > PAR3214.GENERICTCP qt where q_name = :1 and state = :2 order by q_name, > state, enq_time, step_no, chain_no, local_order_no for update skip locked > > The procedure call is following > DBMS_AQ.DEQUEUE( 'par3214.' || qname, queueopts, msgprops, msg_obj, msgid > ); > > Since this is an internal query, I can not change the HINT ( Itested that > removing the hint drops logical reads from 2400 to 3). > > Any ideas? > > Thanks > Shaleen > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: orafaq INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
