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RE: Performance monitoring

From: <Rajesh.Rao_at_jpmchase.com>
Date: Thu, 03 Oct 2002 13:49:11 -0800
Message-ID: <F001.004E01CC.20021003134911@fatcity.com>

BHR has taken quite a beating. I am sure the point everyone's trying to make is that a 99% BHR does not indicate a well tuned database, and a 50% BHR does not indicate a poorly peforming database. A low BHR does not mean I need to increase db_buffers as was believed and practiced earlier. Point well taken and understood. But, it "CAN" be an indicator that something out of the ordinary is happening in my well tuned database. I emphasize on "CAN". Why have the PIO's increased so suddenly? Say, if the BHR is consistently around 80, and suddenly, it drops to 70, or rises to 95, I want to know why? What you infer from the BHR is what counts. There would definitely be other ways of finding this out. Or are there?

Regards
Raj

                                                                                                                    
                    "Grabowy,                                                                                       
                    Chris"               To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>        
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                    October 03,                                                                                     
                    2002 04:53 PM                                                                                   
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Of course!!

I just laughed when he published that script, and didn't think anything more of it. Now I can use it to "drive home" my point. Excellent.

Thanks Kirti.

-----Original Message-----
Sent: Thursday, October 03, 2002 4:03 PM To: Multiple recipients of list ORACLE-L

> some Oracle sites still believe in the myths and ratio based
> tuning. It can be difficult to convince a client that their long
> practiced tuning methodology is "obsolete".

In such cases, Connor's wonderful script comes very handy ;) http://www.oracledba.co.uk/tips/choose.htm I have used it to convince some old dogs....

-----Original Message-----
Sent: Thursday, October 03, 2002 12:44 PM To: Multiple recipients of list ORACLE-L

they haven't been around as a company all that long so I doubt the doc is from 7.3

as for the methodology, I've talked to their DBAs and they are forward thinking, which is why the doc suprised me

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Received on Thu Oct 03 2002 - 16:49:11 CDT

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