HP3000-L Archives

February 2008, Week 2

HP3000-L@RAVEN.UTC.EDU
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Subject:
Re: Howmessy
From:
Jim Phillips <[log in to unmask]>
Reply To:
Jim Phillips <[log in to unmask]>
Date:
Fri, 8 Feb 2008 11:45:26 -0800
Content-Type:
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Thanks for the reply, Gilles.  Patrick from Adager replied as well and after speaking to him on the phone, I am convinced that a capacity change is in order.
   
   
  Jim

Gilles Schipper <[log in to unmask]> wrote:
  I'd try to reduce that max.blocks by increasing the capacity. Try 
increasing to 32001 and run hm again to see the effect on max.blocks.

At 01:20 PM 2008-02-08, Jim Phillips wrote:
>So, I ran Howmessy on the main data base here and the very first 
>data set looks very suspicious. The report for this manual master 
>shows 78% full (19381 entries, 24859 capacity), 30.3% secondaries, 
>maximum blocks=190, blocking factor=1, maximum chain=7, average 
>chain=1.43, standard deviation=.70, expanded blocks=1.43, average 
>blocks=2.30, elongation=1.60 and, are you ready for this, 
>inefficient pointers=100%!
>
> My first thought was to increase the blocking factor (my thinking 
> is with a blocking factor of 1, every pointer must cross a block 
> boundary). I could also increase the capacity somewhat to get the 
> load factor down to 70% or so.
>
> What does this august group recommend?
>
> Jim
>
>
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-------------------------------------------------------------------------------------------------
Gilles Schipper
GSA Inc.
HP System Administration Specialists
300 John Street, Box 87651 Thornhill, ON Canada L3T 7R4
Voice: 905.889.3000 Fax: 905.889.3001
email: [log in to unmask] web: http://www.gsainc.com
-------------------------------------------------------------------------------------------------




       
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