0 Replies Latest reply on Oct 18, 2013 5:23 AM by Jollysl -Oracle

    Disable Intel CPU Hyper threading in Oracle RAC environment

    Jollysl -Oracle

      Dear Expert,



      Does disable CPU hyper threading will have direct impact or maybe unexpected behavior to Oracle RAC database?



      Actually the background of this question is we have many received packet queuing on the network layer waiting to be processed. Investigation leads to the processor utilization which shows that many processor are still in idle state or not used when the other processors are busy processing incoming request.


      I have visited some oracle note like


      CPU Count Consideration for Oracle Parameter Setting When Using Hyper-Threading Technology (Doc ID 289870.1)

      Oracle and Hyper-Threading (Doc ID 205089.1)

      Using PROCESSOR_GROUP_NAME to bind a database instance to CPUs or NUMA nodes (Doc ID 1585184.1)



      These document already give useful information but i wonder if there is any possibilities risk or another consideration of disabling cpu hyper threading.


      Please let me know if any other information required.






      Best Regards,