High system CPU utilization

Solution Verified - Updated -

Issue

  • CPU utilization at 100%
  • System CPU utilization is higher than 60%
  • Load average is up to 800 for a 64 CPU server

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Oracle Database 11g / 12c
    Or any application which is making intensive use of time system calls
    e.g. clock_gettime, gettimeofday, time
  • clocksource is set to acpi_pm in grub.conf

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