Index Settings

• Number of shards cannot be changed after index has been created
• Number of replicas can be updated on existing index:

  PUT /index-name/_settings
  {
    "number_of_replicas": 5
  }
  

• Number of replicas can be configured dynamically:

  index.auto_expand_replicas: 0-5
  

• Query size can be limited to conserve heap memory:

  index.max_result_window: 10000
  

• More index settings