Locate the Source on the Manage > Collection page, and click Pause.Click the Resume link when you are ready for the Source to start sending data again.
Additional information about pause and resume:
When a Source is paused, Sumo Logic continues to ingest the files that were already discovered, but doesn't scan any new ones.
The AWS CloudWatch Source ingests data points only from the past two hours, so you will lose data if you pause the CloudWatch Source for more than two hours. Example: If a CloudWatch Source is paused at 6:00am and resumed at 10:00am, the data points generated between 6:00am and 8:00am are lost.