Verifying real-time scheduling

Verify that real-time scheduling is operating without problems.

On Red Hat® Enterprise Linux® 8 (RHEL 8) the insights-client service is installed by default. It might prevent processes from using real-time scheduling.

Verify whether the insights-client service affects your system. If so, take steps to correct it.
  1. After basic configuration is finished, go to Administration > System > Configuration > System > Prioritisation Settings.
  2. If you cannot change priority values to values higher than normal, go to step 4.
  3. After configuration is finished, go to the logs. Check for the following log message. If it exists or appears at a later time, go to step 4. 
    E  0288  Cannot set
          thread priority of [priority_level] because of: Operation not permitted (to enable IBM
          Safer Payments to perform priority based thread scheduling, you must add the line ' -
          rtprio 20' to the file '/etc/security/limits.conf'
  4. The issue affects your system. For information about how to resolve it, see Insights-client may prevent process to acquire real-time scheduling.

    If the problem persists, see How to configure a RHEL 7 or RHEL 8 system to be able to run programs requiring Real-Time Scheduling .