In Spectrum 10.2.0
When SpectroServer performance is saturated, it no longer generates events and alarms.
I noticed that there are devices generating too much information.
There are several different queries you can run against the ArchMgr DDM database to get "top n" results like - get the top ten models with the most events. All are documented here;
DDM Database Queries - CA Spectrum - 10.2 - CA Technologies Documentation
the poll threads should never hit the maximum for a prolonged period of time. We noticed this behavior with several of our customers and it turned out to be a Spectrum bug. Please refer to the 10.2 patch list - the PTF_020 deals with this issue.
Spectrum 10.2.0 Patch List