title: Can I delete the message field from Logstash?
body: <p>I have a basic Logstash -> Elasticsearch setup, and it turns out the 'message' field is not required after the logstash filter done its job - storing this raw message field to elasticsearch is only adding unnecessary data to storage imo.</p>
  
  <p>Can I safely delete this field and would it cause any trouble to ES? advices or readings are welcome, thanks all.</p>