>Really? The Tomcat ROOT web application is taking up 3 times as much heap >space in Tomcat 6 as Tomcat 7? Yes.
-----Original Message----- From: Christopher Schultz [mailto:ch...@christopherschultz.net] Sent: Monday, March 23, 2015 7:52 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) -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Rahul, On 3/23/15 8:39 AM, Rahul Kumar Singh wrote: >> Exact command-line that starts Tomcat7 (as given e.g. by "ps -ef >> | grep java") : > Tomcat7 <application user> 5597 1 38 02:11 ? 00:00:13 > /usr/lib/jvm/java-1.7.0-openjdk.x86_64/bin/java > -Djava.util.logging.config.file=/opt/tomcat/conf/logging.properties > -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager > -Djava.endorsed.dirs=/opt/tomcat/endorsed -classpath > /opt/tomcat/bin/bootstrap.jar:/opt/tomcat/bin/tomcat-juli.jar > -Dcatalina.base=/opt/tomcat -Dcatalina.home=/opt/tomcat > -Djava.io.tmpdir=/opt/tomcat/temp > org.apache.catalina.startup.Bootstrap start > >> Exact command-line that starts Tomcat6 (as given e.g. by "ps -ef >> | grep java") : > Tomcat6 <application user> 2860 1 0 10:34 ? 00:01:35 > /usr/lib/jvm/java-1.7.0-openjdk.x86_64/bin/java > -Djava.util.logging.config.file=/opt/tomcat/conf/logging.properties > -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager > -Djava.endorsed.dirs=/opt/tomcat/endorsed -classpath > /opt/tomcat/bin/bootstrap.jar -Dcatalina.base=/opt/tomcat > -Dcatalina.home=/opt/tomcat -Djava.io.tmpdir=/opt/tomcat/temp > org.apache.catalina.startup.Bootstrap start > >> Also, which exact example Tomcat application are you deploying in >> both cases above ? > The default application came with apache tomcat 6 and tomcat7 Really? The Tomcat ROOT web application is taking up 3 times as much heap space in Tomcat 6 as Tomcat 7? - -chris > -----Original Message----- From: André Warnier [mailto:a...@ice-sa.com] > Sent: Monday, March 23, 2015 5:27 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) > > Rahul Kumar Singh wrote: >> Hello André Warnier, >> >> Thanks for your response. >> >>> That should be much easier and quicker to check this by yourself, as >>> you obviously already have the 2 Tomcat versions up and running. >>> Remove your own application, deploy one of the standard >>> Tomcat-examples applications, and have a look. >> >> Yes, we have done the above suggested exercise. And got the below >> output of top command result. >> >> Development environment: =========================== RAM: 25 GB >> CPU: CPU Intel(R) Xeon(R) CPU X5450 @ 3.00GHz OS: RHEL Linux >> (5.8) ========================== >> >> Tomcat 6(6.0.28) Virtual Memory: 6772 MB Resident Memory: 81 MB >> > > Exact command-line that starts Tomcat6 (as given e.g. by "ps -ef | > grep java") : > > >> Tomcat 7(7.0.54) Virtual Memory: 6778 MB Resident Memory: 148 MB >> > > Exact command-line that starts Tomcat7 (as given e.g. by "ps -ef | > grep java") : > > (That is for us to know if, for example, there are any command-line > parameters that might explain the difference) > > Also, which exact example Tomcat application are you deploying in both > cases above ? > > Note: these questions are not asked to annoy you, or to delay a > response. You realise that Tomcat is open-source free software, and > that the people manning this forum are doing that for free, on their > own time. Also simulating your case will require someone to spend > some time creating the same setup as yours. So all in all, the more > precise information which you provide, the more time you allow these > people to save in order to give you an accurate answer, and the faster > you will have that answer. > > And if you want to know about heap dumps, this looks like a good start > : > http://www.jahia.com/community/blogs/tips-and-tricks-for-analyzing-jav > a-virtual-machine > > (searching Google for "tomcat heap dump") > >>> If there is still a big difference between v6 and v7, then come back >>> here. At least then there will be a reproducible test case for >>> someone here to have a closer look. And if there is not a big >>> difference, then obviously it must have something to with your >>> application. And then, follow Mark's already-given advice to find >>> out what. >> >> The initial value is also somewhere double of tomcat6. >> >> >> Regards, Rahul Kumar Singh >> >> -----Original Message----- From: André Warnier [mailto:a...@ice-sa.com] >> Sent: Monday, March 23, 2015 2:32 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) >> >> Rahul Kumar Singh wrote: >>> 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? >>> >>> >> >> That should be much easier and quicker to check this by yourself, as >> you obviously already have the 2 Tomcat versions up and running. >> Remove your own application, deploy one of the standard >> Tomcat-examples applications, and have a look. >> >> If there is still a big difference between v6 and v7, then come back >> here. At least then there will be a reproducible test case for >> someone here to have a closer look. And if there is not a big >> difference, then obviously it must have something to with your >> application. And then, follow Mark's already-given advice to find >> out what. >> >> --------------------------------------------------------------------- >> >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >> For additional commands, e-mail: 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. 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