X-Pack monitoring plug-in with Kibana GC charts

Hi Folks,

I am using x-pack monitoring and reviewing the charts that come with them in Kibana. Specifically I am trying to understand the GC Count and GC Duration charts and their relationship to the JVM Heap one. While JVM heap is exhibiting a saw tooth pattern, I see high numbers in GC Duration. Not sure if the GC Count numbers are high as my workload is a new one.

Is the GC Duration the amount of time spent concurrent with the tasks finding pages that will later be collected in one of the Clean and Sweep "stop the world" events? It does not seem to correlate directly to the JVM sawtooth but is partially correlating to my CPU use.

Any guidance or links to explanations one what this data is would be greatly appreciatied.

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Hi Mark, have you read through https://www.elastic.co/guide/en/elasticsearch/guide/current/_monitoring_individual_nodes.html#_jvm_section ? I don't think it directly answers your question, but it might give you some more information to help you make some deductions. If this doesn't clarify anything for you, let me know and I can try to find someone who can answer your specific question.


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