Re: Fine tune or disable JMX activity
On 22/06/2012 16:09, Jacopo Cappellato wrote: Hi all, I am a committer of the Apache OFBiz project; OFBiz uses Tomcat 7.0.28 in embedded mode. While doing some profiling with Java VisualVM I have noticed that a lot of object (java.util.TreeMap$Entry) are created even when there is no traffic; they don't represent a memory leak because a garbage collection removes them all, but the still grow at a very high pace; they seem to be generated by JMX support in Tomcat. Can you explain a little about how you concluded that Tomcat's JMX support is responsible? p Is it possible? Is there a way to disable JMX related activity (if not needed, of course)? I am worried that this could cause an unnecessary waste of server resources (more frequent GCs etc...). Thanks in advance, Jacopo - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org -- [key:62590808] signature.asc Description: OpenPGP digital signature
Re: Fine tune or disable JMX activity
On Jun 22, 2012, at 5:11 PM, Pid wrote: On 22/06/2012 16:09, Jacopo Cappellato wrote: Hi all, I am a committer of the Apache OFBiz project; OFBiz uses Tomcat 7.0.28 in embedded mode. While doing some profiling with Java VisualVM I have noticed that a lot of object (java.util.TreeMap$Entry) are created even when there is no traffic; they don't represent a memory leak because a garbage collection removes them all, but the still grow at a very high pace; they seem to be generated by JMX support in Tomcat. Can you explain a little about how you concluded that Tomcat's JMX support is responsible? I am actually not sure if Tomcat is responsible for this (it could actually be completely unrelated); I think it is related to JMX because I have found that most of the objects are created in the following stack: https://cwiki.apache.org/confluence/download/attachments/27850262/profiler-snapshot.png Regards, Jacopo p Is it possible? Is there a way to disable JMX related activity (if not needed, of course)? I am worried that this could cause an unnecessary waste of server resources (more frequent GCs etc...). Thanks in advance, Jacopo - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org -- [key:62590808] - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Fine tune or disable JMX activity
On 22/06/2012 16:30, Jacopo Cappellato wrote: On Jun 22, 2012, at 5:11 PM, Pid wrote: On 22/06/2012 16:09, Jacopo Cappellato wrote: Hi all, I am a committer of the Apache OFBiz project; OFBiz uses Tomcat 7.0.28 in embedded mode. While doing some profiling with Java VisualVM I have noticed that a lot of object (java.util.TreeMap$Entry) are created even when there is no traffic; they don't represent a memory leak because a garbage collection removes them all, but the still grow at a very high pace; they seem to be generated by JMX support in Tomcat. Can you explain a little about how you concluded that Tomcat's JMX support is responsible? I am actually not sure if Tomcat is responsible for this (it could actually be completely unrelated); I think it is related to JMX because I have found that most of the objects are created in the following stack: https://cwiki.apache.org/confluence/download/attachments/27850262/profiler-snapshot.png There's no Tomcat code in that tree. How many bytes is it using, am I reading that correctly? Is there an issue with this at all? p Is it possible? Is there a way to disable JMX related activity (if not needed, of course)? I am worried that this could cause an unnecessary waste of server resources (more frequent GCs etc...). Thanks in advance, Jacopo - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org -- [key:62590808] - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org -- [key:62590808] signature.asc Description: OpenPGP digital signature
RE: Fine tune or disable JMX activity
From: Jacopo Cappellato [mailto:jacopo.cappell...@gmail.com] Subject: Fine tune or disable JMX activity While doing some profiling with Java VisualVM I have noticed that a lot of object (java.util.TreeMap$Entry) are created even when there is no traffic; they don't represent a memory leak because a garbage collection removes them all, but the still grow at a very high pace; they seem to be generated by JMX support in Tomcat. So let's see... you're using VisualVM which depends on JMX to retrieve the information it reports, and you want to disable JMX? I think you're observing self-induced behavior. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Fine tune or disable JMX activity
On Jun 22, 2012, at 5:45 PM, Caldarale, Charles R wrote: So let's see... you're using VisualVM which depends on JMX to retrieve the information it reports, and you want to disable JMX? I think you're observing self-induced behavior. ah ah, yes I think you are quite right and it was a dumb question indeed. By the way, thank you, it helped me. Jacopo - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
