Do you have any indication that you're dealing with chained rows? expdp
would have to follow chained rows across blocks, doing single block reads.
I'm not sure if your version would do the same with migrated rows, but it
might if it follows the code path used by parallel tablescans.
Regards
Jonathan Lewis
On Thu, 16 Dec 2021 at 03:02, Jack van Zanen <jack@xxxxxxxxxxxx> wrote:
Hi
Oracle 12.2.0.1 Exadata
I am running a datapump and two of the workers are spending a lot of time
on
- cell single block physical read
- cell single block read request
This does not make sense to me as it is full expdp I would expected a full
table scan type of wait, not single block
I checked mos but my search did not find anything related to my version
Does anyone know of any reason why this might happen?
Jack van Zanen
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