I would like to change my AWS Elasticsearch thread_pool.write.queue_size setting. I see that the recommended technique is to update the elasticsearch.yml file as it can't be done dynamically by the API in the newer versions.
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 here so I don't know how to do it with AWS.
You do not have a lot of flexibility with AWS ES. In your case, scale your data node instance type to a bigger instance and that should provide you higher thread pool queue size. A note on increasing the number of shards - do not do it unless really required as it may cause performance issues while searching, aggregating etc. A shard can easily hold upto 50 GB of data, so if you have a lot of shards with very less data then think about shrinking the shards. Each shard in itself consumes resources (cpu, memory) etc and shard configuration should be proportional to the heap memory available on the node.