Hello Joydip,
Here are my suggestions:
1) for testing purpose, try to disable all management modules (
rename config/modes as config/modules_original)
2) Switch from Concurrent GC to G1GC,replace the below settings in the Introscope_Enterprise_Manager.lax > lax.nl.java.option.additional property
XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:CMSInitiatingOccupancyFraction=50
With just this:
-XX:+UseG1GC
3) Make sure DEBUG logging is disabled in the IntroscopeEnterpriseManager.properties.
4) Make sure you have allocated enough memory and make sure to set the initial heap size (-Xms) equal to the maximum heap size (-Xmx) in the Introscope Enterprise Manager.lax or EMService.conf.
5) If the upgrade involved migrating the EM to another server then make sure Smatstor db is pointing to a dedicated disk controller and introscope.enterprisemanager.smartstor.dedicatedcontroller=true which allows the EM to fully utilize this setting. Failing to do this, will reduce collector performance by 50% . From https://docops.ca.com/ca-apm/10-5/en/installing/apm-sizing-and-performance-guide/system-information-and-requirements/ca-apm-data-storage-requirements
“The dedicated controller property is set to false by default. You must provide a dedicated disk I/O path for SmartStor to set this property to true; it cannot be set to true when there is only a single disk for each Collector.
When the dedicated controller property is set to false, **the metric capacity can decrease up to 50 percent.**”
6) I wonder if Differential Analysis is causing a lot of Alerts automatically being created and propagated to AppMap, causing extra overhead in AppMap Alert to States mapping handling, for testing purpose disable the appMap alerting mapping temporarily in the EM (empty teamcenter-status-mapping.properties)
7) Check for any known issue in the log, try searching for the following key words:
- Outgoing message queue is not moving
- No space left on device
- reported Metric clamp hit
- capacity
- too many
- reached
- slowly
- combining
- outofmemory
- skewed
- cannot keep
- Internal cache is corrupt
- Processing of alerts is overloaded
- [ERROR
I hope this helps,
Regards,
Sergio