It's always a little hard to tell from a low-concurrency experiment how bad things can be at high concurrency. (If it were easy, Cary wouldn't have had to have written his book).
I have an example where a collision rate of 0.25% results in an increase in response time of 8% at relatively low concurrency. One of the problems of contention is that the back-off time after a collision may be unsuitably large. (Which is one reason why there was an argument for changing the spin_count on latches - the backoff of 1/100 sec has not changed since 'fast' CPUs clocked 100MHz.) Regards Jonathan Lewis http://www.jlcomp.demon.co.uk The educated person is not the person who can answer the questions, but the person who can question the answers -- T. Schick Jr Next public appearance2: March 2004 Hotsos Symposium - Keynote March 2004 Charlotte NC - OUG Tutorial April 2004 Iceland One-day tutorials: http://www.jlcomp.demon.co.uk/tutorial.html Three-day seminar: see http://www.jlcomp.demon.co.uk/seminar.html ____UK___February 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: Friday, January 09, 2004 5:29 PM > I remember readign that article and I thought the results that the > contention was very minor? Steve, are you monitoring? > > It seemed like one of those things that its so minor its not really > something to worry about? -- 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).
