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摘自https://www.loggly/blog/nine-tips-configuring-elasticsearch-for-high-performance/

Note that in ES the bulk requests queue contains one item per shard, so this number needs to be higher than the number of concurrent bulk requests you want to send if those request contain data for many shards. For example, a single bulk request may contain data for 10 shards, so even if you only send one bulk request, you must have a queue size of at least 10. Setting this value “too high” will chew up heap in your JVM, but does let you hand off queuing to ES, which simplifies your clients.

You either need to keep the property value higher than your accepted load or gracefully handle RemoteTransportException in your client code. If you don’t handle the exception, you will  end up losing data. We simulated the exception shown below by sending more than 10 bulk requests with a queue size of 10.

RemoteTransportException[[<Bantam>][inet[/192.168.76.1:9300]][bulk/shard]]; nested: EsRejectedExecutionException[rejected execution (queue capacity 10) on org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction$1@13fe9be];

本文标签： ElasticsearchQueueCapacity

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