Just as a side-line observation - when I realised that the problem should have been with the sequence, I set up a small test on a multi-CPU box to run multiple concurrent copies of: begin for i in 1..100000 loop insert into t1 values (test_seq.nextval); end loop; end;
I couldn't get a single row cache lock wait. This was using 8.1.7.4 on HPUX 11. So I wonder if the waits you were seeing were a side-effect of another issue, or highly version dependent. Regards Jonathan Lewis http://www.jlcomp.demon.co.uk Coming soon a new one-day tutorial: Cost Based Optimisation (see http://www.jlcomp.demon.co.uk/tutorial.html ) Next Seminar dates: (see http://www.jlcomp.demon.co.uk/seminar.html ) ____England______January 21/23 The Co-operative Oracle Users' FAQ http://www.jlcomp.demon.co.uk/faq/ind_faq.html -----Original Message----- To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> Date: 23 December 2002 14:40 >If I stated dc_segments in my original post, I apologize, I *did* mean to >say >dc_sequences. At any rate, as usual, the problem was poor application >code. >The row cache lock no longer shows up as one of the top 5 wait events per >statspack. > >And of course, the programmers never apologized, or even deigned to >acknowledge >appreciation in improving their application, they are simply acting as >offended >cats will do, as though the DBA team doesn't exist. > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Jonathan Lewis 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).