it was also mentioned at the Oracle of Oracles closing session, in the
"top 10 things I learned in San Diego" :)
- Cary Millsap <cary.millsap_at_hotsos.com> wrote:
> Might have been Dave too, but I mentioned it in my "Misunderstandings
> About Oracle Internals" talk at IOUG on Tuesday...
>
>
> Cary Millsap
> Hotsos Enterprises, Ltd.
> cary.millsap_at_hotsos.com
> http://www.hotsos.com
>
>
> -----Original Message-----
> Sent: Monday, April 22, 2002 10:58 PM
> To: Multiple recipients of list ORACLE-L
> n
>
> I think it was Dave Ensor...
>
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: Monday, April 22, 2002 6:30 PM
>
>
> > Hi Connor,
> >
> > Somebody (I think it was Cary) mentioned your little PL/SQL
> procedure
> that
> > will provide any required CHR. So you are famous, even if you were
> not
> > present :)
> >
> > And yes, without seeming to migrate to the CHR camp, there is some
> merit
> in
> > what you are saying. However, I would suggest that tracking
> 'normal'
> delta
> > values of 'cache buffer chain' gets, misses, spins and sleeps from
> > V$SYSTEM_EVENT/V$LATCH, as well as deltas of 'table scan rows
> gotten'
> vs
> > 'table fetch by rowid' would be a better 'ratio' than the CHR which
> will
> > only serve to feed a myth. The former would give you some
> indication
> of
> LIO
> > (and the stress it causes on the system) and the latter will
> indicate
> raw
> > requirements that were met but were the ones that drove PIO.... As
> for
> me,
> I
> > detect changes in the following SQL and page out to an on-call DBA
> when
> some
> > set limits are exceeded:
> >
> > select event, count(*) from v$session_wait
> > group by event;
> >
> > This does show the 'current' bottleneck and I still remain true to
> the
> > calling of OWI!!
> >
> > John Kanagaraj
> > Oracle Applications DBA
> > DBSoft Inc
> > (W): 408-970-7002
> >
> > Grace - Getting something we don't deserve
> > Mercy - NOT getting something we deserve
> >
> > Click on 'http://www.needhim.org' for Grace and Mercy that is
> freely
> > available!
> >
> > ** The opinions and statements above are entirely my own and not
> those
> of
> my
> > employer or clients **
> >
> >
> > > -----Original Message-----
> > > From: Connor McDonald [mailto:hamcdc_at_yahoo.co.uk]
> > > Sent: Monday, April 22, 2002 4:44 PM
> > > To: Multiple recipients of list ORACLE-L
> > > Subject: RE: Anything new from IOUG? + "OWI" Born!!
> > > (Anjo/Mogens, please
> > > n
> > >
> > >
> > > I still like to recommend the buffer cache hit ratio
> > > because its so easy to please customers with an
> > > improvement - A plsql routine to generate any desired
> > > hit ratio on a running system is freely available for
> > > download from my site... a consultants dream! :-)
> > >
> > > But, serious hat on temporarily, there IS still a use
> > > for the buffer hit ratio as a "delta" measurement.
> > > What I mean by this is that you measure it every 'n'
> > > mins/hrs/whatever and store it. When it displays a
> > > massive dip or a massive increase (ie something out of
> > > the ordinary for *your* system), then whilst it
> > > doesn't necessarily mean anything is wrong - it DOES
> > > mean that something has changed in your system, which
> > > is a good prompt to do some investigation..
> > >
> > > hth
> > > connor
> > >
> > > --- John Kanagaraj <john.kanagaraj_at_hds.com> wrote: >
> > > Mark,
> > > >
> > > > This is from a first-timer at IOUG, so I may be way
> > > > off here.
> > > >
> > > > A lot of marketing blurb was thrown out at IOUG
> > > > (probably a lot less than
> > > > usual, and *much* less than Oracle OpenWorld in any
> > > > case!). As for tools,
> > > > many vendors were flogging the same ones, improved
> > > > versions maybe. One which
> > > > did make us say 'wow' was StorageXpert from Quest.
> > > > IMHO, this is an
> > > > excellent tool, engineered by our very own Gaja. I
> > > > believe details are at
> > > > the Quest site at www.quest.com. If you have EMC
> > > > disks and are facing
> > > > performance problems, I believe there is the best
> > > > there is. (Or even if you
> > > > have other storage devices, it would still give you
> > > > the hotspots).
> > > >
> > > > And NO, I do NOT work for Quest, nor have Quest
> > > > stock!
> > > >
> > > > And for others, I believe this was a major turning
> > > > point and an eye-opener
> > > > as far as the Wait Interface goes (This has
> > > > (un)officially been renamed to
> > > > OWI as per Kirti's slides :-). Most attendees 'saw
> > > > the light' as far as CHR
> > > > (Cache Hit Ratio) goes, and there were two distinct
> > > > camps after the first
> > > > few days - the 'CHR' and 'OWI'. No prizes for
> > > > guessing who won the day! The
> > > > massive number of defections and the absolute
> > > > absense of
> > > > CHR-based-discussions at the Performance round
> > > > tables was clear evidence
> > > > that OWI is here to stay! (Mr. R might still rewrite
> > > > that book sooner than
> > > > later!)
> > > >
> > > > About 20 Listers met for dinner on Sunday night (and
> > > > again in a larger group
> > > > at the SeaWorld bash). The meeting was characterized
> > > > by geek-talk such as
> > > > 'Can you fit us all in one extent?' i.e. 'can we all
> > > > sit at one table?'),
> > > > 'Please coalesce' - 'please move in so that more
> > > > people can fit into the
> > > > aisle seats'.
> > > >
> > > > Oh Boy, that WAS a lot of fun!
> > > >
> > > > John Kanagaraj
> > > > Oracle Applications DBA
> > > > DBSoft Inc
> > > > (W): 408-970-7002
> > > >
> > > > Grace - Getting something we don't deserve
> > > > Mercy - NOT getting something we deserve
> > > >
> > > > Click on 'http://www.needhim.org' for Grace and
> > > > Mercy that is freely
> > > > available!
> > > >
> > > > ** The opinions and statements above are entirely my
> > > > own and not those of my
> > > > employer or clients **
> > > >
> > > >
> > > > > -----Original Message-----
> > > > > From: Mark Leith [mailto:mark_at_cool-tools.co.uk]
> > > > > Sent: Monday, April 22, 2002 4:58 AM
> > > > > To: Multiple recipients of list ORACLE-L
> > > > > Subject: Anything new from IOUG?
> > > > >
> > > > >
> > > > > Hi All that recently attended IOUG.
> > > > >
> > > > > If you don't already know - I sell "tools" for
> > > > Oracle.
> > > > > (delete this now if
> > > > > you want to DG! ;P)
> > > > >
> > > > > I was just wondering if anybody at IOUG had any
>
=== message truncated ===
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Received on Wed Apr 24 2002 - 10:38:39 CDT
