title: Imagick Memory & CPU limits
body: <p>I am using Imagick latest version &amp; PHP 5.3. When I try to create a thumbnail for images (code below), the script uses too much CPU. How can I set limits on resource consumption on Imagick?</p>
  
  <pre><code>$thumb = new Imagick();
  $thumb-&gt;readImage($this-&gt;tmp_file);
  $thumb-&gt;thumbnailImage(200, null);
  $thumb-&gt;writeImage($this-&gt;thumb_file);
  $thumb-&gt;destroy();
  </code></pre>
  
  <p>Thanks.</p>