Dear Thomas, Thanks for your quick response,
>Tomcat doesn't use anything like that much memory on its own. I suspect it is >the application although the difference between Tomcat 6 and Tomcat 7 is >unexpected. Ok, I understand, But could you please confirm us theoretically that is there any difference in initial memory requirement of tomcat6 and tomcat 7? Above question is because of the below observation. 1-The deployed application is same. Even no difference in deployment scenario and no change in application. 2-The underlining java environment is also same. (java version "1.7.0_09-icedtea" OpenJDK Runtime Environment (rhel-2.3.3.el5.1-x86_64) OpenJDK 64-Bit Server VM (build 23.2-b09, mixed mode)), 3-The initial memory of tomcat is increased by three times. Regards, Rahul Kumar Singh -----Original Message----- From: Mark Thomas [mailto:ma...@apache.org] Sent: Monday, March 23, 2015 1:13 PM To: Tomcat Users List Subject: Re: Tomcat 7 (7.0.54) memory consuption is very high(3 times) than Tomcat 6 (6.0.28) On 23/03/2015 07:05, Rahul Kumar Singh wrote: > Hi Tomcat support team, > > While upgrading Tomcat from tomcat 6(6.0.28) to tomcat 7 (7.0.54). > the following problem happens. TOMCAT 7 (7.0.54) memory consumption > increased about approx. 3 times compare to the existing tomcat 6 > (6.0.28) memory consumption. > > Tomcat 6.0.28 memory consumption MAP. RESIDENT MEMORY:300-400 MB > Approx. > > Tomcat 7.0.54 memory consumption MAP. RESIDENT MEMORY:900-1800 MB > Approx. > > Underline java platform is same(OpenJDK7) in both tomcat 6 and tomcat > 7. Now question is that, why the memory consumption increased about 3 > times in Tomcat 7. Tomcat doesn't use anything like that much memory on its own. I suspect it is the application although the difference between Tomcat 6 and Tomcat 7 is unexpected. The only way to find out what is going on is to look at what is using that memory. You'll need to take a heap dump and/or use a profiler to find out. Mark --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org<mailto:users-unsubscr...@tomcat.apache.org> For additional commands, e-mail: users-h...@tomcat.apache.org<mailto:users-h...@tomcat.apache.org> DISCLAIMER: ----------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or NEC or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of NEC or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. . -----------------------------------------------------------------------------------------------------------------------
