Hi. We have a solr index with around 2.5M documents , running solr 8.11 . We have bunch of fields that we faceet/sort/highlight on. Heap is 8GB, out of 12 GB RAM
These fields were not defined with docValues=true due to some legacy design issues , but if we were to rewrite the app, we would definitely have the docvalues enabled for those fields that participate in facet/sort/highlight. Problem: I do see garbage collection ( G1GC) kicking in when the traffic is moderate to high, with a "pause full" event that takes around 2seconds to complete. This event happens more often when the traffic is high. I see this GC event happening when the humongous regions go beyond 1000. The humongous region size is 4M I took a heap dump and analyzed with VisualVM, but I couldnt pinpoint what objects are using the 'humougous region' . My question is, using the VisualVM, is it possible to pinpoint which / what objects are using the 'humongous region' ? If for example I have an solr indexed field called "answerSnippet" , if that is the culprit, Is it possible to see the field answerSnippet in the VisualVM heap dump output? All i see is byte[] with 55% heap occupancy, but dont know what objects constitute that byte[] Can anybody throw some light on this ? I really appreciate the help. thanks -- Surya
