PUSH-000773
Multiplexer {} is making slow progress on cycle {}. {} events processed, {} on queue. Recent history [time:+cycles,+idle cycles,+events,+network operations,queue]: {}.
Description
Diagnostic information logged when a multiplexer operational cycle has taken more than the configured monitoring period. Common causes include concurrent garbage collections (enable JVM garbage collection logging to investigate); overly general topic selectors that must be tested against many topics (prefer topic selectors with more specific prefix paths); subscription processing for many sessions (if more CPU cores are available, consider increasing the number of multiplexers).