IBM Data and AI Ideas Portal for Customers


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Status Not under consideration
Workspace Db2
Components Utilities (Export Import Load db2look etc)
Created by Guest
Created on Oct 17, 2018

RELATED IDEAS

Online Reorg takes 10 times the size of the table in logs to complete

Note - case id TS000861837 (it won't let me inter this in the pmr)
See example provided in pmr.
Some table take more than 10 times the size of the table in logs to complete.
There seems to be very little in the way of documentation that I or the pmr analyst could find supporting the extent of this behavior (at least there needs to be a big warning imo).
From the pmr I am told that this is working as designed as far as IBM are concerned which I find difficult to fathom.
A similar reorg in Z/OS uses minimal logs as it builds a second copy and then flips the two copies - just like db2 luw index reorg.

Either the current online reorg should be changed to reduce the log usage or the same method that is used for indexes (and db2 z/os uses for tablespaces) should be available as an option for table reorgs.

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