Our servers have 130 GB of RAM and we are giving ElasticSearch 30GB of heap. Each machine contains one shard that is about 3GB with about 1.3 million documents. When we search using a match query and the "memory" store type, the queries are about twice as fast as when we use "mmap (with mlockall…

Slow search perfomance when using mmap versus memory

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Slow search perfomance when using mmap versus memory

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