title: Locate Memory Leak in Apache/PHP
body: <p>I've got a website that is running LAMP.  On Saturday, the site crashed.  Turns out the hard drive on our dedicated server (4.5 years old) went south.  They replaced the drive (with updated OS (Cent 5.x if makes difference)) and I uploaded the code (that has been working perfectly for 4+ years) and restored the databases (thank god for backups!).</p>
  
  <p>Suddenly the site periodically slows to a halt.  The support staff is reporting that Apache is running out of memory and it's killing performance.  I can see one of the apache threads monopolizing the memory (sometimes over 50%).</p>
  
  <p>The system has a lot of source (too much to paste here for sure) so I don't even know where to begin to look.</p>
  
  <p>One thing I <em>DID</em> notice is that I set up the server originally in Jan 2009.  The new hard drive is running PHP 5.3, which was not available then (I am presuming we were on 5.2, but of course I can't check any configurations...).  Is there some resource of what I might be able to check?</p>
  
  <p>Any help appreciated. I am befuddled as to how an application running for 4+ years suddenly has drastic change by moving 1 version of PHP.</p>
  
  <p>Thanks.</p>