Application Performance Degradation After Update from RHEL 6.2 to RHEL 6.4

Solution Unverified - Updated -

Issue

  • After updating our systems to RHEL 6.4 from RHEL 6.2, a custom CPU intensive application is suffering a 20% increase in time to complete.
  • Basic checks performed:
    • sysctl settings are identical
    • VMWare-tools reinstalled after the update
    • VMWare configuration set to “None” to disable hyperthreading.
    • cpuspeed service disabled

Environment

  • Red Hat Enterprise Linux, version 6.4
  • VMWare guest
  • Custom CPU intensive application

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