A customer migrated OLTP applications from servers with directattached storage to new servers using a CLARiiON array. Users are complaining about poor application performance. The following information is available for your review:
Performance Manager data on CLARiiON and SAN switches Current CLARiiON configuration information Oracle statistics for the applications EMC Grabs on the new servers You suspect that cache settings on the CLARiiON array are not appropriate. What is the best method to validate your suspicions?

A.
Ask the Customer Engineer to disable read caching and see if that helps

B.
Compare the current CLARiiON configuration with installation settings made by Professional Services

C.
Review the overall LUN performance mixture to determine if cache settings are appropriate

D.
Run HEAT reports on the Grabs