That's all dependant on numerous things, be it hardware, software, applications running etc... And to answer your question yes it can. Or you can setup tomcat and other tools to track performance. Really you should read up on tomcat and see what options are available to you. I'm sorry for the general answer to your general question. Cheers, Eric <div class="gmail_quote">On Wed, Jun 30, 2010 at 5:10 AM, Kaushal Shriyan <<a href="mailto:kaushalshriyan@gmail.com">kaushalshriyan@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi Is there a way to know what causes high iowait on ubuntu server. I see high %wa intermittently on hardy 8.04 server. I have tomcat server running on it. Can it be alerted via email if for specific reason it occurs. Please suggest/guide further. Thanks Kaushal -- ubuntu-server mailing list <a href="mailto:ubuntu-server@lists.ubuntu.com">ubuntu-server@lists.ubuntu.com</a> <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-server" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-server</a> More info: <a href="https://wiki.ubuntu.com/ServerTeam" target="_blank">https://wiki.ubuntu.com/ServerTeam</a> </blockquote></div>