title: Changing AWS Elasticsearch properties (without elasticsearch.yml) like threadpool queue size
body: <p>I would like to change my AWS Elasticsearch <code>thread_pool.write.queue_size</code> setting. I see that the <a href="https://stackoverflow.com/a/46599707/1193874">recommended</a> technique is to update the <strong>elasticsearch.yml</strong> file as it can't be done dynamically by the API in the newer versions. </p>
  
  <p>However, since I am using AWS's Elasticsearch service, as far as I'm aware, I don't have access to that file. Is there anyway to make this change?  I don't see it referenced for version 6.3 <a href="https://docs.aws.amazon.com/elasticsearch-service/latest/developerguide/aes-supported-es-operations.html#es_version_6_3" rel="nofollow noreferrer">here</a> so I don't know how to do it with AWS.</p>