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What are the limitations when an Oracle instance is managed by Suns processor sets, dynamic system domains or dynamic reconfiguration (DR)?

April 26, 2017domains Dynamic instance limitations managed Oracle processor Sun system

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What are the limitations when an Oracle instance is managed by Suns processor sets, dynamic system domains or dynamic reconfiguration (DR)?

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Processor sets & dynamic system domains with the Oracle database work well. Instance re-boot may be required solely when the number of CPU’s is changed. Oracle discovers the number of CPU’s when booting, and uses this for a number of algorithms for allocating resources (latches, lots of others). So if the number of CPU’s changes (i. e., not a maintenance swap resulting in no change in the number of CPU’s), rebooting may be required if performance suffers. Dynamic Reconfiguration (DR) CPU DR: Oracle can tolerate DR CPU changes. As with processor sets, a reboot may be required if the number of CPU’s changes and performance suffers suffers as a result. Memory DR: The Solaris DR-detach process that migrates memory is not supported.