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Query Regarding performance improvement

 
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Rahul_kumar
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Joined: 24 Jun 2006
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PostPosted: Wed Dec 08, 2010 12:19 pm    Post subject: Query Regarding performance improvement
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Hi,

In an existing code which I am modifying I can see an unnecessary column being fetched from the table and is being updated without any processing which I feel is an overhead since there are n no. of records which will be fetched and later updated.So ,I need to remove that unnecessary column which is being fetched but want to know how much performance it can improve in case a justification is required from my end for this change.Can anyone please help.

Thanks,
rahul
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dbzTHEdinosauer

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PostPosted: Wed Dec 08, 2010 1:48 pm    Post subject:
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why a performance justification? from a data security perspective,
the actvities of the code is from a business perspective - incorrect.

but if you want an algorithm, this is the one that I use:

3**47(column-length-factor) - 8**21(total-row-count)
/
total-rows-retrieved * irritation-factor
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enrico-sorichetti

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PostPosted: Wed Dec 08, 2010 2:02 pm    Post subject: Reply to: Query Regarding performance improvement
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the wisest thing would be to ask inside Your organization about ...
CODE CLEANUP policy

it has nothing to do with the performance yet.

maybe the preceding revision of the program was really updating those columns
and in order not to break the overall logic the IO was left there

better ask!
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Rahul_kumar
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PostPosted: Wed Dec 08, 2010 3:11 pm    Post subject:
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hmm..better not to do anything with the existing logic

Thanks for the suggestions!!
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PeterHolland

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PostPosted: Wed Dec 08, 2010 3:25 pm    Post subject:
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Just remove it. If another program uses that column it will go down and
then you know the column was not there for fun.
Ok, you will have to do some explanation to some people.
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Anuj Dhawan

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Joined: 22 Apr 2006
Posts: 6258
Location: Mumbai, India

PostPosted: Wed Dec 08, 2010 8:56 pm    Post subject:
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Quote:
3**47(column-length-factor) - 8**21(total-row-count)
/
total-rows-retrieved * irritation-factor
Is the irritation-factor a universal-constant, like, Universal Gravitational Constant (G) - or it's varaible? And I'd wonder if it is part of denominator... icon_lol.gif
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