Understanding Elasticsearch memory usage in OpenShift

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Elasticsearch appears to require a lot of memory. When looking at memory usage on a node running a logging-es pod, it can be noted that the ES process is using all the memory allocated to it in the INSTANCE_RAM environment variable and memory limit in the resources section of the logging-es DC. Even when adding more memory to the logging-es DC, it will consume all the new memory given to it. T...

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