KG, I got the direct mail much quicker than the list mail - but I'll just echo the doubt I raised in the original.
If you use 10046 level 8 to watch for log writer writes, I would expect you to see writes that could be of an almost arbitrary size. Assume a 3MB log buffer - we 'know' that Oracle triggers on 1MB: but what if the system is busy when a write is triggered and the users are generating lots of work ? LGWR writes 1MB - and in that time interval the users fill the other 2MB of the log buffer. The next write that LGWR does is 2MB. You could even argue that if the largest write you regularly see is 2/3 of the log buffer size, then the trigger is probably 1/3 of the log buffer size. Regards Jonathan Lewis http://www.jlcomp.demon.co.uk Now available One-day tutorials: Cost Based Optimisation Trouble-shooting and Tuning Indexing Strategies (see http://www.jlcomp.demon.co.uk/tutorial.html ) ____UK_______April 8th ____UK_______April 22nd ____Denmark May 21-23rd ____USA_(FL)_May 2nd Next dates for the 3-day seminar: (see http://www.jlcomp.demon.co.uk/seminar.html ) ____UK_(Manchester)_May ____USA_(CA, TX)_August 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]> Sent: 17 March 2003 17:42 > Jonathan: > > I have just sent a mail which has the test statistics. > I would appreciate your comments on that.. > > Alternatively, people who are curious may want to > test the log writer writing habits using the > event 10046^8. > > KG > > > Best Regards, > K Gopalakrishnan > -- 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).
