Increase ElasticSearch RAM #2130
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The standard recommendation is to give 50% of the available memory to Elasticsearch heap, while leaving the other 50% free. It won’t go unused; Lucene will happily gobble up whatever is left over. Source: https://www.elastic.co/guide/en/elasticsearch/guide/current/heap-sizing.html#_give_less_than_half_your_memory_to_lucene
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The standard recommendation is to give 50% of the available memory to Elasticsearch heap, while leaving the other 50% free. It won’t go unused; Lucene will happily gobble up whatever is left over. Source: https://www.elastic.co/guide/en/elasticsearch/guide/current/heap-sizing.html#_give_less_than_half_your_memory_to_lucene