title: MySQL high CPU usage with InnoDB
body: <p>I'm getting very high MySQL CPU utilization on my VPS server (about 80% CPU usage constantly, even without any queries.)</p>
  
  <p>If I disable InnoDB, using the following lines in my.cnf,</p>
  
  <pre><code>ignore-builtin-innodb
  default-storage-engine = myisam
  </code></pre>
  
  <p>I get 0% CPU utilization, which leads me to think that there is some problem with the InnoDB implementation that causes high CPU usage.</p>
  
  <p>Is there any way to debug this? (Showing the process list in mysql doesn't give me any relevant information at all.)</p>
  
  <p>MySQL version: 5.5.29</p>
  
  <p>(I'm also using nginx)</p>