thanks for reply . The same scenario and the same configuration, i test tomcat 8.0.45 and tomcat 8.5.16 again. tomcat 8.0.45 and tomcat8.0.32 have almost same performance?? tomcat 8.5.16 and tomcat7.0.39 have almost same performance?? Because my test case is very simple http request , big performance fluctuation may be caused by a little synchronized operation. I found it thread stack the synchronized code in InternalNioOutputBuffer.java: private synchronized void addToBB(..)?? synchronized is must?
i will test and verify it if the impact come from here. Thanks. ------------------ Original ------------------ From: "Mark Thomas"<ma...@apache.org>; Date: Mon, Jul 24, 2017 04:29 PM To: "Tomcat Users List"<users@tomcat.apache.org>; Subject: Re: The performance reduce much for tomcat 8 ?? On 24/07/17 09:18, jianjun.guo wrote: > Hi, > I deployed a very simple jsp page to test the performance for tomcat7 vs > tomcat8. > > > The same scenario and the same configuration?? The TPS for tomcat7.0.39 is > 8.3W, but for tomcat8.0.32 only 6.1W?? > > > There is a big difference for them? Thanks for your help. It is hard to comment without knowing the details of the application that was deployed. I don't recognise the units used for the results. 7.0.39 was released roughly 3 years earlier than 8.0.32. It is possible that bug fixes applied to 7.0.x and 8.0.x have impacted performance in some way. It is also over a year since 8.0.32 was released. Performance differences between the latest 7.0.x and 8.5.x releases (or 9.0.x) are more likely to be investigated. Mark --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
