title: How to tell if any MySQL connections has been dropped or timed out?
body: <p>A client is using PHP to connect to MySQL. The PHP scripts and the MySQL database are located on 2 different Linux servers. He complained that database connections were being dropped or timed out and asked me to take a look.</p>
  
  <p>Is there any place in MySQL that can show me what and how many connections have been dropped or timed out? I looked into slow query log and didn't see anything.</p>
  
  <p>Any suggestions on how to diagnose this dropped/timed out database connection problem?</p>
  
  <p>Thanks</p>