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At a customer deployment we found that after upgrading from 25.1.0 to 26.1.0 the number of Netflow (v9) packets being processed by Minion dropped significantly:
PR: https://github.com/OpenNMS/opennms/pull/3017
Testing this with udpgen initially got the following results:
Was able to profile the Minion JVM using YJP, got the following results while iterating:
Problems appear to be related to lock contention on the different queues being used.
Disabling the off-heap feature improved performance slightly, but it was still lagging behind where it was before:
At a customer deployment we found that after upgrading from 25.1.0 to 26.1.0 the number of Netflow (v9) packets being processed by Minion dropped significantly: