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IDS Forum

Re: question on sysmasterdb

Posted By:
Date:

Hi Sushil;
Thanks for your advice.But I think it's necessary to
mention that even in the cases that we do disk
initialization(eg. after oninit) we get the same
result.What's your oponion about that?Do you have any
solutions?!
Thanks in advance.
--- Sushil Shirodkar <sushilps@hotmail.com> wrote:
> Hi Nilofar,
>
> You are very humble and polite in writing email, you
> don't have
> to give all your information(including your
> membership number etc)
> just put your problem/question and folks around will
> reply to your question
> problem and its upto you whether you should opt for
> it or not.
>
> On this site we have good people/gurus who can give
> correct answers to your
> question.
>
> Ok. regarding your problem if you want to match your
> figures there
> are 2 ways :
>
> 1) Depends what "update statistics" you run, if you
> just run with
> "LOW" which is default then its ok and if you run
> its via MEDIUM
> or HIGH then the "sysdistrib" table gets updated
> and the figures
> could be different, in other words it depends
> when you run the
> query to match the figures.
>
> "Update Statistics" is whole big topic of
> discussion.
>
> I use script which is used to run UPDATE
> STATISTICS(LOW/MEDIUM/HIGH), and is
> based on the INDEXES, where clause & unused columns
> in the queries to the
> specific table.
>
> People on this site say that it is not advisable to
> drop rows from
> sysdistrib table, but I do drop the tables from
> sysdistrib before
> running "UPDATE STATISTICS" with MEDIUM/HIHG option,
> it doesn't make
> any difference with LOW option for sysdistrib.
>
> 2) Other option is you can zero out the counts by
> "onstat -z" and
> then try running your query and compare the
> results.
>
> This is just my thought on your problem, hope have
> not confused you.
>
>
> Sushil....
>
>
>
> >From: "nilofar kha...." <nilofkh@yahoo.com>
> >To: ids@iiug.org
> >Subject: question on sysmasterdb [915] Date: Sun,
> 13 Apr 2003 09:16:42
> >-0400 (EDT)
> >Received: from ace.iiug.org ([216.177.38.212]) by
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> 2003 06:42:10 -0700
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> 13 Apr 2003 09:23:56
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> >X-OriginalArrivalTime: 13 Apr 2003 13:42:11.0022
> (UTC)
> >FILETIME=[7BE256E0:01C301C2]
> >
> >Hi;Dear Sir;
> >I'm a member of iiug with username "20337" named
> >"khalafi" and email address "nilofkh@yahoo.com".
> >I have some questions and problems in relation with
> >system monitoring.Our system is a database using
> >"Informix Dynamic Server 7.31.UD1" on Unix
> >platform.When I use a query as follow , it give
> some
> >information about databaseserver but the problem is
> >that the showing informiation is defferent from the
> >real information on system;eg. diskread shows 23333
> >while the real amount of it is 966.I wanted to know
> >why the result of queries like this (queries on
> >sysmasterdatabase) is different from reality?select
> >d.name,fname[15,25] path_name,sum(pagesread)
> >diskreads, sum(pageswritten) diskwrites
> >from syschkio c,syschunks k,sysdbspaces d
> >where d.dbsnum=k.dbsnum
> >and k.chknum=c.chunknum
> >group by 1,2
> >order by 1;
> >
> >WITH THANKS.
> >
> >
> >
> >
> >
> >__________________________________________________
> >Do you Yahoo!?
> >Yahoo! Tax Center - File online, calculators,
> forms, and more
> >http://tax.yahoo.com
> >
>
>
>
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