Re: Partition exchange

Hey Ken,

When doing the partition exchange to a different tablespace, all of the data has to be moved. Data dictionary updates "only" would only apply if keeping the segments in the same tablespace.

Regards,
Darrell

On Mar 12, 2008, at 7:35 PM, Ken Naim wrote:

> I am in the process of moving the partitions of a table from ASSM
> to a non-assm tablespace using the partition exchange method
> (create non partitioned table, indexes, constraints etc.). When I
> do the alter table exchange partition including indexes without
> validation command it runs for hours, doing a full table scan on
> all the partitions of the partitioned table which takes many hours.
> I understood that just the data dictionary is updated, and it
> should take a few seconds. Primary Wait event is db file scattered
> read. Can anyone shed some light on this phenomenon. DB version is
> 10.2.0.3 and is running on Solaris 10.
>
>
> Thanks,
> Ken

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