It worked, Mark! When I launched Tomcat from command line, it fired up Bootstrap loader. Then JMC can print NMT statistics.
I believe tracking NMT is not a common need. Still, it would be awesome if we can do the same thing with changes in Apache Commons Daemon. Thanks! On Fri, Mar 3, 2017 at 2:06 PM, Mark Thomas <ma...@apache.org> wrote: > On 03/03/17 06:20, Suvendu Sekhar Mondal wrote: >> Mark, >> I am running Tomcat as a Windows service. > > Then I suspect that supporting this would require changes in Apache > Commons Daemon which is what Tomcat uses to start the Windows service. > > It would probably be quicker for you to run Tomcat from the command line > to get the debugging information you require - assuming you have a > one-off need. If you want ongoing monitoring then Daemon changes is > would be the better option. > > Mark > >> >> Thanks! >> Suvendu >> >> On Thu, Mar 2, 2017 at 8:08 PM, Mark Thomas <ma...@apache.org> wrote: >>> On 02/03/17 10:54, Suvendu Sekhar Mondal wrote: >>>> Hello Everyone, >>>> >>>> I am new here. :) >>>> >>>> Environment: >>>> Java Version: Java HotSpot(TM) 64-Bit Server VM version 25.91-b15 >>>> (Java version 1.8.0_91-b15) >>>> Tomcat Version: Tomcat 8.0.20 >>>> OS Version: Microsoft Windows 8.1 Enterprise >>>> >>>> I am trying to enable Native Memory Tracking(NMT) to get internal >>>> memory usage deatils about Tomcat process which is running on my >>>> system. I have added following flags to Tomcat's Java options: >>>> -XX:+UnlockDiagnosticVMOptions >>>> -XX:NativeMemoryTracking=summary >>>> -XX:NativeMemoryTracking=detail >>>> >>>> After that I restarted Tomcat. When I tried to use "VM.native_memory" >>>> command either from JCMD or JMC, I am getting "Native memory tracking >>>> is not enabled" message. When I shutdown Tomcat, following message is >>>> getting printed on STDERR log: >>>> "Java HotSpot(TM) 64-Bit Server VM warning: Native Memory Tracking did >>>> not setup properly, using wrong launcher?". >>>> >>>> I found this article which discussed about NMT problem in custom JVM >>>> launcher: >>>> https://blogs.oracle.com/poonam/entry/using_nmt_with_custom_jvm >>>> >>>> My question is, does that stands true for Tomcat also? Is there any >>>> other way to enable NMT in Tomcat? >>> >>> No idea. How did you start Tomcat? >>> >>> Mark >>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >>> For additional commands, e-mail: users-h...@tomcat.apache.org >>> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >> For additional commands, e-mail: users-h...@tomcat.apache.org >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
