2.6.x docs updated, e.g., https://docs.hortonworks.com/HDPDocuments/Ambari-2.6.1.3/bk_ambari-upgrade/content/preparing_to_upgrade_ambari_and_hdp.htm ... View more

Ambari Product Docs define database requirements, at: http://docs.hortonworks.com/HDPDocuments/Ambari-2.4.2.0/bk_ambari-installation/content/database_requirements.html. Ambari installs PostgresSQL as the default, (since Ambari v2). http://docs.hortonworks.com/HDPDocuments/Ambari-2.4.2.0/bk_ambari-installation/content/setup_options.html describes how to specify database type and location. Thanks for posting additional, specific information for AWS EC2. ... View more

Created Jira issue: https://hortonworks.jira.com/browse/BUG-58987 to correct/clarify the linked instruction ... View more

For more information about using Ambari Metrics, see http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.2.0/bk_Ambari_Users_Guide/content/ch_using_ambari_metrics.html ... View more

To see a list of metrics for each service in your cluster, use the Ambari Dashboard, as described here: http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.1.1/bk_Ambari_Users_Guide/content/_viewing_the_cluster_dashboard.html For a list of available Alerts, see: http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.1.1/bk_Ambari_Users_Guide/content/_list_of_predefined_alerts.html ... View more