Cost-Based Optimizer and AIX Virtual Processors
- From: David Barbour <david.barbour1@xxxxxxxxx>
- To: Oracle-L Freelists <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 29 Apr 2009 16:12:19 -0400
Has anyone seen execution plans change using virtual processors on AIX? How
about VM/Linux or VM/Windows? For the purposes of the optimizer, I'd think
they'd all react in a similar manner.
We've got several partitions on an AIX system. If a specific instance has a
certain allotment of processors (generally >=2) when a query kicks off, it
runs differently than when the instance is basically idle (<= 1 processor
allocated) and the query starts.
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