Where does Oracle Enterprise Manager derive the "User Logon Time" metrics from?
"Logon Per Sec" and "Logon Per Tx" can be found in OEM REPOSITORY (e.g. look in sysman.mgmt$metrics_daily view, the metric_name = 'instance_throughput' and metric_column like 'logons%'). The other metric will also be there, these are maintained in OEM REPO not in individual targets.