Changing Size Category of CIF_IMOD table

Hi,
There was a performance issue in CO11 transaction, then we found out that , select query fetching data from the table CIF_IMOD iis expensive. So we created a secondary index for this table(N0n-Unique index-->No database index). The performance issue was resolved for few days. Again we are facing the same issue and now we are trying to change the size category fo the table CIF_IMOD. Currently its size category is 1 (holds 75 to 340 records) . but it contains more records.
Please advice me will it improve the performance after changing the size category and what will be its impact on the system.
If someone had faced the same issue please share your experience,
Thanks
-Always Learner

Hi,
Size category will not improve the performance data reading from table, It used only how motch tablespace allow when extend the table size.
You should check for which index is corrently and it is right index or not.
Check for last Index Statistics update date, if it is not updated recently, Tell basis person to update index statics.
Rgds
Ravi Lanjewar
Edited by: Ravishankar Lanjewar on Jun 23, 2010 1:48 PM

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Suppose the data in the table exceeds the size category of the table defined, will there be any problem??
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Changing the table category now will not improve performance.
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Edited by: Sheela Patil on Oct 4, 2011 7:21 PM

Hi
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6        2,400,000 to     4,900,000
7        4,900,000 to     9,800,000
8        9,800,000 to    19,000,000
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I need to change the next extent size of the a table.
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Moderator message: FAQ, please search for previous discussions and read F1 help.
Edited by: Thomas Zloch on Mar 8, 2012

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Hi,
Using Oracle 11.20.3 on AIX.
We have a table about 800 million rows and 120gb in size.
Want to try copies oif this table to evalaute different partitiong strategies.
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Would have liked say datapump table 1 tro disk and datapumo import the data to new table but do the tables need to be of the same format.
Thanks

>
Using Oracle 11.20.3 on AIX.
We have a table about 800 million rows and 120gb in size.
Want to try copies oif this table to evalaute different partitiong strategies.
What is the quickest way to do this?
Would have liked say datapump table 1 tro disk and datapumo import the data to new table but do the tables need to be of the same format.
>
First your subject asks a different question that the text you posted: Best way to change partition key on existing table. The answer to that question is YOU CAN'T. All data has to be moved to change the partition key since each partition/subpartition is in its own segment. You either create a new table or use DBMS_REDEFINITION to redefine the table online.
Why do you want to export all data to a file first? That just adds to the time and cost of doing the op.
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>
Is this quicker than datapump?
>
Yes - exporting the data simplying moves it all an additional time. Ok to export if you need a backup before you start.
>
Found artcle which talks about using merge option on datapump import to convert partitioned table to non-partitioned table.
>
How would that apply to you? That isn't what you said you wanted to do.

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Changing Size Category of CIF_IMOD table

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