title: How to check current open connections on redis master
body: <p>I am trying to see if I can find out how many open client connections are there on the redis master server.
  I tried <code>INFO Stats</code> command but that one only gives me total_connections_received which doesn't really give me what I need.</p>
  
  <p>Apart from this, I ran <code>INFO Commandstats</code> and can't really understand the following output completely</p>
  
  <pre><code>cmdstat_setex:calls=8,usec=96,usec_per_call=21
  </code></pre>
  
  <p>In redis documentation, it doesn't really say what are the units of these numbers. Does it really mean that every setex call takes 21 seconds to complete?
  I am wondering how to read this line. What is it really trying to convey.</p>