Re: Slow AS400 performance

[Jerry Adams <jerry@xxxxxxxxxxxxxxx>]

Al,

This intrigues me because it just so happens that I'm working on a 
project to unarchive history.  The current process is to back off the 
sales history to a separate library at year end. 


So far I've merged the last two year's with the current year's history 
(in a test environment, of course).  There are no discernible 
differences to me (but I'm blind in one eye and can't see too well out 
of the other one) as far as inquiry goes.  The inquiries do ask the 
requestor for the customer and, optionally, a starting date.


Naturally, if I was reading the sales history as an Input Primary, I 
would expect things to take longer.  Is this what you are talking about, 
or is there some impact on the random searches (inquiries)?  What kind 
of activity other than the I/P would adversely impact a situation such 
as this?


Thanks.

        * Jerry C. Adams
*IBM System i Programmer/Analyst
B&W Wholesale Distributors, Inc.* *
voice
        615.995.7024
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        615.995.1201
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        jerry@xxxxxxxxxxxxxxx <mailto:jerry@xxxxxxxxxxxxxxx>



Al Mac wrote:

>   Depending on your applications, archiving can dramatically improve
>   performance.  Let's suppose for example, people are using an inventory
>   history inquiry program and the history has 10 years of data, but 99% of
>   the people only need to see what is in the last 2 weeks.
>
>   Having 500 weeks of data in the file can slow access for people who only
>   need to see 2 weeks worth.  Archiving solution makes the data available to
>   the 1% applications that need to see 500 weeks, while performance
>   dramatically improved for the 99% of your users.
>
>   There's bunch of people on these lists who are familiar with the various
>   archiving alternatives and can elucidate further if this interests you.
>
>   -
>   Al Macintyre
>   http://en.wikipedia.org/wiki/User:AlMac
>   BPCS/400 Computer Janitor ... see
>   http://radio.weblogs.com/0107846/stories/2002/11/08/bpcsDocSources.html
>