title: Java EE opensource monitoring tools
body: <p>I use JMeter and JavaMelody tools to generate charts for transactions, threads and response times, but I want to get more precised information. </p>
  
  <p>I'm looking for tools that give me information about:</p>
  
  <ul>
  <li>kind of existing threads (like blocked or waiting)</li>
  <li>JDBC connection times</li>
  <li>EJB - bean pool (number of loaded beans)</li>
  </ul>
  
  <p>It would be great if that tool generate visual reports, like charts. I saw several existing topics, but many of tools aren't free.</p>