RE: So how big is your buffer cache ?

  • From: "Gogala, Mladen" <Mladen.Gogala@xxxxxxxx>
  • To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
  • Date: Mon, 30 Aug 2004 09:53:26 -0400

> -----Original Message-----
> From: April Wells [mailto:AWells@xxxxxxxxxx] 
> Sent: Monday, August 30, 2004 8:23 AM
> To: 'oracle-l@xxxxxxxxxxxxx'
> Subject: RE: So how big is your buffer cache ?
> But really people...
> What does it matter in the long run... size doesn't matter  
> anyway, right?

That's the first time I see a lady say that. I thought it was a
consolation of us, middle-aged, chubby DBA males. Joking aside,
the buffer cache should be increased using the same principle
as for everything else: you increase the buffer size when you start
seeing free buffer waits in your V$SYSTEM_EVENT. The basic principle 
of the event-based tuning methodology is to try fixing that what 
sessions are actually waiting for, instead of computing BCHR, 
horoscope or your personal lucky number.

Mladen Gogala
A & E TV Network
Ext. 1216
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