title: How can I tell how long Solr replications and commits take
body: <p>I know that my Solr commitWithin should be set to a greater length than a commit usually takes.  </p>
  
  <p>Likewise, in my replicated setup, I guess my pollInterval should be set to something longer than a replication takes.</p>
  
  <p>I can't work out how to see how long commits and replications take though - how do I do it?</p>