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Facing problem when doing Strobe

 
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manojtyagi_09

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Joined: 30 Oct 2006
Posts: 10

PostPosted: Mon Sep 29, 2008 9:43 am    Post subject: Facing problem when doing Strobe
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Hi

I am getting the message "Very FEW samples" when doing strobe for a Program in which a cursor fetches the record from Db2 table and writes to output file.

The table contain 2400 records.

Can anyone inform what can i do to get the report with this set of records.

Min session Duration : 1 min

Target sample size : 10000 >> i tried it with 100, 1000 also but same error.
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dick scherrer

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Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Mon Sep 29, 2008 9:49 am    Post subject:
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Hello,

Suggest you look in the Strobe documentation or talk with your systems support person/people who support Strobe.

Your situaton appears to involve Strobe more than DB2, so i moved your topic to the Compuware part of the forum.
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Robert Sample

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Joined: 06 Jun 2008
Posts: 7936
Location: Bellevue, IA

PostPosted: Mon Sep 29, 2008 4:55 pm    Post subject:
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Strobe needs a minimum number of samples to accurately portray the program execution status. The message you're getting indicates Strobe isn't collecting enough samples for accuracy. You can tell Strobe a better estimate of the run time, or merely be aware that your results that Strobe shows may not be reproducible across multiple runs.
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mike duff

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Joined: 05 Mar 2009
Posts: 4
Location: halifax

PostPosted: Sat Nov 28, 2009 4:55 am    Post subject: Re: Facing problem when doing Strobe
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manojtyagi_09 wrote:
Hi

I am getting the message "Very FEW samples" when doing strobe for a Program in which a cursor fetches the record from Db2 table and writes to output file.

The table contain 2400 records.

Can anyone inform what can i do to get the report with this set of records.

Min session Duration : 1 min

Target sample size : 10000 >> i tried it with 100, 1000 also but same error.


The last shop I worked in required 100,000 sample size to make the strobe statistically correct (error < 2% & <10%)
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dbzTHEdinosauer

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Joined: 20 Oct 2006
Posts: 6966
Location: porcelain throne

PostPosted: Sat Nov 28, 2009 6:16 pm    Post subject:
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A technique that I used when encountering the same problem:

I coded a 'loop' in the program controlled by PARM:
if the PARM was not there, then the loop was 1,
otherwise I performed the program 10,000 times.

just put code at the beginning of your program that effectively performs your 'existing program'. the only thing that you miss is the db2 code at the begining that sets up addressability for db2 and host variables.
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