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Option for tuning the VSAM START command to avoid CPU Usage

 
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vijikesavan

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Joined: 04 Oct 2006
Posts: 118
Location: NJ, USA

PostPosted: Wed Feb 07, 2007 10:48 pm    Post subject: Option for tuning the VSAM START command to avoid CPU Usage
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Hi,
I have a program which uses a Huge VSAM file. When we ran strobe on it, it showed that the maximum CPU is in the command "START"
the exact statement
Code:
START STRFILE
     KEY IS NOT < FC-KEY


Please suggest with any option for tuning or any other method to access the VSAM file.
Thanks,
Viji
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William Thompson

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Joined: 18 Nov 2006
Posts: 3158
Location: Tucson AZ

PostPosted: Thu Feb 08, 2007 3:03 am    Post subject:
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FC-KEY is the/a key, isn't it?
This is just a quick look at the index, it shouldn't take long unless the index is poorly structure has problems.
How many index levels are there?
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vijikesavan

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Joined: 04 Oct 2006
Posts: 118
Location: NJ, USA

PostPosted: Thu Feb 08, 2007 8:45 pm    Post subject: Re: Option for tuning the VSAM START command to avoid CPU Us
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I am not sure how to find the levels of index. When I try to do a info in fileaid for this vsam it says

Code:
INDEX COMPONENT: 'VK824G7.VSAM.STRMSTR.INDEX'

only.
Can you help me in this.

Appreciate your help.
Thanks,
Viji
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William Thompson

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Joined: 18 Nov 2006
Posts: 3158
Location: Tucson AZ

PostPosted: Thu Feb 08, 2007 11:36 pm    Post subject:
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You'll need to look at a listcat, I think it lists it there....
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