Let me guess ... and it's the same (Oracle) DBA who is helping tune your DB2 system. Different RDBMS, different magnitude of hardware ... same approach? If I were talking to the DBA, I would suggest asking IBM for help in tuning the migration. If I were the DBA, I would have tried to get that tuning in before plunking down the money. However, as neither case applies, the best you likely could do is suggest to the DBA that s/he talks to IBM, and suggest it in such a way that it sounds like the DBA's idea.
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