Mike -- EMAIL IGNORED wrote on Tue, 4 Aug 2009 16:56:22 +0000 (UTC):
Please refer to my thread "excessive DNS slows httpd"
Why don't you keep posting in there then?
Suggestions would be most welcome.
Foremost, you want to find out why those queries are generated despite the fact that hostnamelookups are off. That is surely something in your configuration or a web application. It's not a general problem of Apache on CentOS, mine are all not doing that.
Kai