How to limit number of CPU's in Red Hat Enterprise Linux on a multi-core server

Solution Verified - Updated -

Issue

  • What is the procedure to disable/enable processors (on the fly) on systems with multiprocessors? These are production systems and the procedure must be very transparent.
  • How to limit number of CPU's on server in Red Hat Enterprise Linux ?
  • How to restrict server to "N" number of CPU's only ?

Environment

  • Red Hat Enterprise Linux (RHEL) 5
  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 7
  • Red Hat Enterprise Linux (RHEL) 8
  • Red Hat Enterprise Linux (RHEL) 9

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