RE: Estimating the Time required to Build Access Paths

I don't have a formula but I have a  file that is in the range of 1million
records and a size of almost 1 gig. This file has 7 logicals. On this
midlevel 320 it took 4+ hours to do this file with almost no other act on
the system.


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From: Al Barsa, Jr.
To: midrange-L@midrange.com
Subject: Estimating the Time required to Build Access Paths
Date: Thursday, October 22, 1998 12:04PM

Hi,

I am currently working on a system that is very over utilized from both a
performance and disk space perspective.  We are currently purging old data
(delete phase), and then will have to reorganize files. Of course the
system has many to many LFs.

I have a two hour window nightly from end of batch/backup to when the
system has to be back for the users.

I am looking for any kind of algorithm or formula to help me assess how
long the access path build portion of the re-org will take.

Any ideas?

Al




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Al Barsa, Jr. - Account for Midrange-L
Barsa Consulting, LLC.  
400 > 390

Phone:  914-251-9400
Fax:    914-251-9406


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