Scale the AWS cloud event schedulers

Scale the cloud event schedulers to improve the Amazon Web Services (AWS) event processing rate of the ServiceNow instance.

Vorbereitungen

Role required: cloud_admin

Warum und wann dieser Vorgang ausgeführt wird

If the instance receives a huge number of events and it doesn’t process them within a reasonable time, create additional Cloud Event Schedulers. Running multiple cloud event schedulers in parallel helps to improve the event processing rate of the instance. When the event inflow rate reduces, you can deactivate some of the Cloud Event Schedulers. For more information, see AWS events-driven discovery.

Prozedur

1. Configure the number of Cloud Event Schedulers that you want to use.
   1. Navigate to All > System Properties > All Properties.
   2. In the Name column, search for sn_cmp.cloud_event.parallel_scheduler_count.
   3. On the sn_cmp.cloud_event.parallel_scheduler_count property form, set the Value field to an appropriate value.
      Wichtig:

      • Make sure that the value of the sn_cmp.cloud_event.parallel_scheduler_count property doesn’t exceed the count of available worker nodes.
      • If you have multiple domains where cloud events are configured, use the sn_cmp.cloud_event.parallel_scheduler_count property with caution because each cloud event scheduler has multiple iterations for each domain in which cloud events are active.
   4. Select Update.
2. Execute the Cloud Event Scheduler Count Monitor scheduled job.
   The Cloud Event Scheduler Count Monitor scheduled job manages the count of Cloud Event Schedulers per the value specified in the sn_cmp.cloud_event.parallel_scheduler_count property.
   1. Navigate to All > System Definition > Scheduled Jobs.
   2. Open the Cloud Event Scheduler Count Monitor scheduled job.
   3. Select Execute Now.