Hi,<div><br></div><div>I have a web server which is randomly becoming unresponsive.   I&#39;ve checked for hardware problems with no luck :</div><div>- no ethernet errors</div><div>- no disk errors</div><div>- no memory errors</div>
<div><br></div><div>So far I&#39;ve managed to point the trouble at the web server since if I restart httpd (apache) it comes back to normal.</div><div><br></div><div>This is not a shared server so I control (or at least like to think of) what is hosted so I have two suspects:</div>
<div>a) my own code is behaving strangely.   For example, a php script that in a given situation/parameters increases the usage.</div><div>b) some sort of attack.  Either in conjunction to a or other vulnerability.</div><div>
<br></div><div>I am looking for advices in how can I pin point since looking at every line of code would be infeasible.</div><div><br></div><div>Centos 5.5 / apache / php 5.2.10 </div>