Helmet, Mogens makes a lot of good points as normal. As usual it's never as simple as we'd like it too be and it depends on how your system runs. One thing that is worth monitoring is changes in statistic values over time.
For example if your buffer cache hit ratio is normally 85% during your peak on- line usage but then on it changes to 75% this indicates that something significant has changed and probably needs investigating. It doesn't necessarily mean you have a performance problem because if the users are happy that performance is good and batch is performing as expected then all's OK. (BTW I'm aware that buffer cache hit ratio statistics in isolation aren't a good indicator of performance good or bad.) HTH Cheers, Chris Quoting Mogens Nørgaard <[EMAIL PROTECTED]>: > Hi Helmut, > > There are so many opinions about this that it's hard to point at one > specific document or recommendation. If anything, start with stuff > written by Graham Wood (who has done a good deal of the work on it), > Bjorn Engsig (ditto), or such guys. Also, Tom Kyte has something about > it in his new book, so go look on asktom.oracle.com for his opinions > about it. > > If you hope to find threshold numbers for certain values, etc.... then > someone would have automated it a loooong time ago. There can be two > reasons for this not having happened: It depends on the installation, > situation, etc. - or a lot of system-level measurements are in reality > useless. That's pretty much my opinion, but thankfully a lot of much > smarter people disagree with me. > > Best regards, > > Mogens > > Daiminger, Helmut wrote: > > >Hi! > > > >We want to introduce a performance monitoring policy here. We are using the > >STATSPACK utility. > > > >What are sections in statspack reports to look for? What are threshold > >numbers for these values? > > > >Does anybody have any power points or papers about it? > > > >This is 9.2 on HP-UX. > > > >Thanks, > >Helmut > > > > > > > > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: =?ISO-8859-1?Q?Mogens_N=F8rgaard?= > 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). > Chris Dunscombe [EMAIL PROTECTED] ------------------------------------------------- Everyone should have http://www.freedom2surf.net/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- 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).
