title: How can I check indices.memory.index_buffer_size parameter is effectively working in elasticsearch?
body: <p>I have elasticsearch cluster, and I add indices.memory.index_buffer_size parameter in elasticsearch.yml file. 
     I set this parameter be 70%. And then the cluster began to indexing. After all, I reset this parameter be 10%, and I restart the elasticsearch.</p>
  
  <p>My question is how can I check my settings are working?</p>