title: 500 Internal Server - Apache
body: <p>My site frequently displays 500 Internal Server Error. Restarting apache, brings the site back to normal state. Other sites running on the same server does not have this issue. Apache error log have no information related to this. The apache loglevel of this site is set as "warn".</p>
  
  <p>What may be the reason for this ?</p>
  
  <p>My site is written on PHP and deployed in linux server. </p>