This article covers EM Performance and the Harvest Cycle.
Q: What is the work being done by the harvesting process with respect to MOM? Is the high harvest capacity causing calculators to run with high harvest time?
A: It is the reverse: high calculator harvest time leads to high harvest duration resulting in much of the harvest capacity being used. The target is for Harvest Duration (and SmartStor Duration, too) to stay well below 3.5 seconds to satisfy ad-hoc queries.
Below are probable causes of EM performance degradation and the corresponding indicator metrics:
Agents Sending Too Many Metrics and/or Leaks.
Calculators/Alerts matching too many metrics.
Too Many Ongoing Queries or Transaction Trace Events.
Too Many Broad Historical Queries.