Updating index.max_result_window must be done after creating the index

[almasaeed2010]

Elasticseach by default returns upto 10,000 results and errs when requesting anything more than that. The way to update the index is using

curl -XPUT 'http://localhost:9200/_all/_settings?preserve_existing=true' -d '{
  "index.max_result_window" : "1000000"
}'

Question is can this be done while the cluster is up and running? Maybe we should look into a way that assigns it this setting when creating the index.