Open the Workstation, check the EM metrics clamps, expand the branch:
Custom Metric Host (virtual)
- Custom Metric Process (virtual)
- Custom Metric Agent (virtual)(collector_host@port)(SuperDomain)
- Enterprise manager
looks at the values for:
- "EM Historical Metric Clamped"
- "EM Live Metric Clamped"
the above metrics should be 0. If they are 1 you need to increase the corresponding clamp(s) in the EM/config/collectors apm-events-thresholds-config.xml file:
If Introscope Workstation is not available search in the EM log(s) for : "too many"
The below message is an indicator that introscope.enterprisemanager.metrics.historical.limit clamp has been reached and you need to increase it.
[WARN] [Harvest Engine Pooled Worker] [Manager.Agent] The EM has too many historical metrics reporting from Agents and will stop accepting new metrics from Agents. [ Current count = 1,303,258. Max count = 1,200,000]