How to increase the number of semaphores

Solution Verified - Updated -

Issue

  • Need to increase semaphore array limits for applications such as Apache Webserver.
  • Need to increase maximum number of semaphore sets for a 3rd-party application.
  • IBM DB2 database instances goes down with error "Requesting too many semaphores".

Environment

  • Red Hat Enterprise Linux 4.
  • Red Hat Enterprise Linux 5.
  • Red Hat Enterprise Linux 6.
  • Red Hat Enterprise Linux 7.
  • Red Hat Enterprise Linux 8.
  • Red Hat Enterprise Linux 9.

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