title: ColdFusion JVM: strange memory behaviour
body: <p>Since last month, we got a problem on our company's server (Win2008ServerStd + IIS7 + CF enterprise 9.0.1 (hotfix2)).</p>
  
  <p>I used jConsole to monitor the Coldfusion JVM (1.6.0_24) activity and here's what I see:</p>
  
  <p><img src="https://i.stack.imgur.com/ml8bE.png" alt="Curve1"></p>
  
  <p><img src="https://i.stack.imgur.com/ocHXJ.png" alt="Curve2"></p>
  
  <p>Notice that strange "curve" between 14:10 and 14:15 ! What is that?</p>
  
  <p>Obviously it's not a standard behaviour, when it happens, my applications hang for 30 to 70 seconds!</p>
  
  <p>Do you know what can cause that memory issue? It seems like GC does not run correctly, or hangs itself.</p>
  
  <p>I don't expect a flash-answer, I wonder there can be a lot of root problems causing that but.... where can I start investigating?</p>