Re: [SPAM] RE: Is it really necessary to reduce ITL Waits to near zero?

  • From: "Anjo Kolk" <anjo.kolk@xxxxxxxxxxx>
  • To: Mark.Bobak@xxxxxxxxxxxxxxx
  • Date: Thu, 10 May 2007 01:21:12 +0200

Has been at the heart of YAPP since 1996, but then again that is over almost
12 years old now :)

On 5/9/07, Bobak, Mark <Mark.Bobak@xxxxxxxxxxxxxxx> wrote:

 Hi David,

I actually did read most of your last post, and I was going to reply.
But, I got pulled into a meeting and sidetracked, etc....

Anyhow, to address your much simplified question:  No, if ITL waits (or
any kind of wait or contention) does not contribute to response time, don't
waste your time.  This is at the heart of Method R, which Cary describes in
his book, and Amdahl's Law, which you can read about here:

Simple conclusion is that if it doesn't affect user response time, why do
you care?


*Mark J. Bobak*
*Senior Oracle Architect*

"There are 10 types of people in the world:  Those who understand binary,
and those who don't."

*From:* oracle-l-bounce@xxxxxxxxxxxxx [mailto:
oracle-l-bounce@xxxxxxxxxxxxx] *On Behalf Of *Taft, David
*Sent:* Wednesday, May 09, 2007 3:44 PM
*To:* 'oracle-l@xxxxxxxxxxxxx'
*Subject:* [SPAM] RE: Is it really necessary to reduce ITL Waits to near
*Importance:* Low

 <the sound of crickets in the background>  Yea, silence is pretty much
what I got from my co-workers on this same subject.  I probably provided
too much info. Believe me, I do understand,  however please let me
ask this question:

If ITL Waits are not a significant contributor to response time nor
causing deadlocks, can you think of a circumstance that justifies reducing
ITL waits on an object?  Must be my analness, but I keep feeling like I've
overlooked something.


David Taft

 *From:* Taft, David

My main concern is if this analysis is sound.  I think it is, but would
appreciate a second opinion ...

Anjo Kolk
Owner and Founder OraPerf Projects
tel:    +31-577-712000
mob: +31-6-55340888

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