#1. what is the difference in the 4 BCHR's in 9i? #2. How do you determine whether your buffer cache is sized properly? ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Saturday, December 27, 2003 9:34 AM
> Hi Yong > > I agree that "It's not the ratio that needs condemning, it's > > the advice about..." What I disagree is the wrong educational > > tool people on public forums have recently used again and > > again to show the inadequacy of the BCHR tuning method. > > The thing is most people who have used this demonstration, use it for 2 > reasons > > 1. It is immediately recognised and empathised with by the audience and > 2. It is easily explained. "How does it work, by doing pointless io, hmmm I > wonder if that is a problem with my real system." > > You are of course in principle correct that one could use the same technique > against other ratios, my suggestion would be that this might also be > appropriate for similar reasons. My CPU is 75% utilized on my web server, I > wonder does this mean it is well specified or that I am doing pointless cpu > work? > > If people are merely saying "the bchr is useless, here is a script that will > create one for you" then I would agree with you, but in my experience the > argument is more cogent than that. > > Niall > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Niall Litchfield > 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.net -- Author: Ryan 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).
