Greetings, I'm pretty new to the concept of threads and debugging them - I currently am running... Server version: Apache/2.0.53 Server built: Mar 6 2005 21:52:49 I am utilizing the worker mpm to serve a moderate volume website with two servers. I extensively use mod_perl, but I realize this is not a mod_perl list. I purely wish to learn ways of finding out what stage/process is going on when this thread/process locks up. This should be general to apache, right? My symptoms are that a server will start utilizing 100% of one of the 4 cpus. (this happens on both) This usually happens within 18 hours of a server startup, but seems entirel.y random. If I do an 'apachectl restart', the problem will almost always go away. However, even on shutdown, there will be a several httpd processes left that will not die without a kill -9 to them specifically. When I display top, it shows the cpu usage, but it doesn't show which process is using it - sorting by cpu usage shows no process using more than about 0.3% of the cpu. I need help. Can you suggest commands that would allow me to track the threads, see what might be happening in the request stream when this occurs? Hopefully, Skylos --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx