Jenkins Pipeline job triggering every 5 minutes automatically in Openshift

Issue

• Why does the Jenkins Pipeline run every 5 minutes automatically as per pollSCM configuration even if there are no new commits made in SCM?
• Is the below configuration correct to configure pollSCM as part of JenkinsFile?

properties([
        pipelineTriggers([
            pollSCM('H/5 * * * *')
        ])
      ])