Chris, The profiler shows very high CPU utilization in Tomcat threads.
As I said before a lot of time was spent during the ResponseFacade.setContentType() method call. That doesn't tell the whole story but more or less the high utilization is mainly in the tomcat threads. The thing which puzzles me the most is I am able to scale the req/sec with multiple clients on Tomcat 6 and the same doesn't happen on Tomcat 7? Can it be the JVM? Would it help trying with a latter version of JVM? Thanks. ________________________________ From: Christopher Schultz <ch...@christopherschultz.net> To: Tomcat Users List <users@tomcat.apache.org> Sent: Friday, 24 May 2013 3:24 AM Subject: Re: Performance Issue while upgrading from Embedded Tomcat 6 to Tomcat 7 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Chirag, On 5/23/13 1:21 PM, Chirag Dewan wrote: > With c=1 it is 70k req/sec and with c=2 it is 35k in both i.e the > total req/sec cannot be scaled beyond 70k. With Tomcat 6 it is 60k > in both clients i.e total of 120k. > > I do not expect more than 75k req/sec being served by Tomcat 7,but > its the benchmark set by Tomcat 6 which I can't overlook. As I said > I wouldn't have mind 80-90 % utilization on peak load,but its the > already running server performance which I am compelled to follow > or even carry out more. What do you see when you attach a profiler to Tomcat while you run your load tests against it? (Now that you have removed your own webapp from the mix and are just fetching trivial resources). - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJRnpAFAAoJEBzwKT+lPKRY91AQAJicVT7nLNBzr4m7eqOs6sRn R+hCNT37A0HWS8+A8Ns52FyCUUmOljrFVP8LcwA1J0IXFxxI1GvCGNdL7y8248dF cWKyyMYUpmiGbwRBcz0XTvxJoGLwo55Wv7pnYsdecU7d93epXcPSZTQHM3zI82ZB TEShV/AHigcnA9mEe8NV1XgLzCZclh9mjfP2uIhhBHvNkoK3gX0oMey8xK9lezlJ ArGKy1RUNsvnWaDvmFC5o5FQyh8CPDnxXalGgDKnjxFHQfUOtCXaFdWdgeiPL6xn TPiuWIEdqNXERLAjY9IjXzoXpBkxRcYPEwN4V3/tHZapw6C7M9OmcmuXMfhF5UEP G4e+nhcy2CtdUum38j4g1LLEB06QRmc1DIt6czb3kqKQR3FTBpRSkBdWEjJhZnxU JVRIYiK8rOqxXygJcga0VlI5xSIzHh2JK7qlT6rc+zqWQTHXOFkmxyGMfjb+hx+i Mofp0lrO9aczFopb/C3uF7gOAb5c0hhhf1Smxvy9nCl2YscA+BarhWdwiOeEGd+6 mNTK/unQIZLJI3Sqb8xgaaGoa5FEvfoaRptweiqON76hNZGrFDxCnQeG9h6W12uW CGQfEWnbgmWkao/ZrIGYkxmRQNd7n4w2jEfzxdD40yrDX+jyQ7VbWrKkX/m/0K+b 7h8osL0Vaqk+GtaWfuPA =cRWt -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
