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Current thread count monitoring
by Amit Bhargava
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Hi,
I'm new to Tomcat monitoring. I have an installation of Tomcat 5.5 on Windows 2003 server. I am trying to monitor Tomcat using JConsole (part of JDK 6). Could someone please tell me how I can get the current thread queue length in Tomcat? Regards, Amit --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: Current thread count monitoring
by Johnny Kewl
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--------------------------------------------------------------------------- HARBOR: http://coolharbor.100free.com/index.htm The most powerful application server on earth. The only real POJO Application Server. --------------------------------------------------------------------------- ----- Original Message ----- From: "Amit Bhargava" <amit.bhargava@...> To: <users@...> Sent: Wednesday, May 14, 2008 1:43 PM Subject: Current thread count monitoring > Hi, > > I'm new to Tomcat monitoring. I have an installation of Tomcat 5.5 on > Windows 2003 server. I am trying to monitor Tomcat using JConsole (part of > JDK 6). Could someone please tell me how I can get the current thread > queue length in Tomcat? > > Regards, > Amit You have to add something like this to Java Opt -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port="9004" -Dcom.sun.management.jmxremote.authenticate="false" -Dcom.sun.management.jmxremote.ssl="false" Enter in the Java Tab of the service console, if you using a windows service. Then TC knows you want to JMX Then in the JDK/bin you start JConsole tell it Remote localhost:9004 Then stuff will start happening... Look at Mbeans Tab Catalina/Threadpool/http-8080/attributes and choose the thread details you need. CurrentThreadCount CurrentThreadBusy etc... > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: Current thread count monitoring
by Amit Bhargava
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Hi John,
Thank you very much for your prompt reply. I am able to connect to the MBean using JConsole and see values for CurrentThreadCount etc. My understanding is that 'maxThreads' determines how many threads will be created by the Connector to deal with requests. After this, 'acceptCount' determines the number of threads which will be allowed to wait in queue. So is the current queue length that I am looking for CurrentThreadCount - maxThreads? Thanks again. Regards, Amit Johnny Kewl wrote: > > --------------------------------------------------------------------------- > > HARBOR: http://coolharbor.100free.com/index.htm > The most powerful application server on earth. > The only real POJO Application Server. > --------------------------------------------------------------------------- > > ----- Original Message ----- From: "Amit Bhargava" > <amit.bhargava@...> > To: <users@...> > Sent: Wednesday, May 14, 2008 1:43 PM > Subject: Current thread count monitoring > > >> Hi, >> >> I'm new to Tomcat monitoring. I have an installation of Tomcat 5.5 on >> Windows 2003 server. I am trying to monitor Tomcat using JConsole >> (part of JDK 6). Could someone please tell me how I can get the >> current thread queue length in Tomcat? >> >> Regards, >> Amit > > You have to add something like this to Java Opt > -Dcom.sun.management.jmxremote > -Dcom.sun.management.jmxremote.port="9004" > -Dcom.sun.management.jmxremote.authenticate="false" > -Dcom.sun.management.jmxremote.ssl="false" > > Enter in the Java Tab of the service console, if you using a windows > service. > > Then TC knows you want to JMX > > Then in the JDK/bin you start JConsole > tell it Remote localhost:9004 > > Then stuff will start happening... > Look at Mbeans Tab > Catalina/Threadpool/http-8080/attributes > and choose the thread details you need. > CurrentThreadCount > CurrentThreadBusy > > etc... > >> >> --------------------------------------------------------------------- >> To start a new topic, e-mail: users@... >> To unsubscribe, e-mail: users-unsubscribe@... >> For additional commands, e-mail: users-help@... >> >> > > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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RE: Current thread count monitoring
by Caldarale, Charles R
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> From: Amit Bhargava [mailto:amit.bhargava@...]
> Subject: Re: Current thread count monitoring > > My understanding is that 'maxThreads' determines how many > threads will be created by the Connector to deal with > requests. That's the maximum number of threads for the <Connector>; if there are fewer active requests than that, there will be fewer threads in the pool. > After this, 'acceptCount' determines the number of threads > which will be allowed to wait in queue. No, it's the number of *requests* that wait in the queue, until one or more threads become available to process them. > So is the current queue length that I am looking for > CurrentThreadCount - maxThreads? No. I don't believe there's a means of determining the number of requests in the queue since the waiting requests are sitting in the TCP/IP stack, not in Tomcat (I think - I haven't looked at that area of the code, and it may vary depending on the connector class). - 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 start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: Current thread count monitoring
by Amit Bhargava
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Hi Chuck,
Thank you for the clarifications. I guess I'll experiment with perfmon to see what I can dig up... Regards, Amit Caldarale, Charles R wrote: >> From: Amit Bhargava [mailto:amit.bhargava@...] >> Subject: Re: Current thread count monitoring >> >> My understanding is that 'maxThreads' determines how many >> threads will be created by the Connector to deal with >> requests. >> > > That's the maximum number of threads for the <Connector>; if there are > fewer active requests than that, there will be fewer threads in the > pool. > > >> After this, 'acceptCount' determines the number of threads >> which will be allowed to wait in queue. >> > > No, it's the number of *requests* that wait in the queue, until one or > more threads become available to process them. > > >> So is the current queue length that I am looking for >> CurrentThreadCount - maxThreads? >> > > No. I don't believe there's a means of determining the number of > requests in the queue since the waiting requests are sitting in the > TCP/IP stack, not in Tomcat (I think - I haven't looked at that area of > the code, and it may vary depending on the connector class). > > - 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 start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: Current thread count monitoring
by DaveyS
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Hi,
You could use a J2EE monitoring solution such as FusionReactor: http://www.fusion-reactor.com/ We have a Demo on our site and you can get lots of feedback including JDBC monitoring. Not to mention the overhead per request is sub millisecond. Regards, D
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Re: Current thread count monitoring
by Amit Bhargava
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Hi Dave,
Thanks for the link. Will try it out. Regards, Amit DaveyS wrote: > Hi, > > You could use a J2EE monitoring solution such as FusionReactor: > > http://www.fusion-reactor.com/ http://www.fusion-reactor.com/ > > We have a Demo on our site and you can get lots of feedback including JDBC > monitoring. Not to mention the overhead per request is sub millisecond. > > Regards, > D > > > Amit Bhargava wrote: > >> Hi, >> >> I'm new to Tomcat monitoring. I have an installation of Tomcat 5.5 on >> Windows 2003 server. I am trying to monitor Tomcat using JConsole (part >> of JDK 6). Could someone please tell me how I can get the current thread >> queue length in Tomcat? >> >> Regards, >> Amit >> >> >> --------------------------------------------------------------------- >> To start a new topic, e-mail: users@... >> To unsubscribe, e-mail: users-unsubscribe@... >> For additional commands, e-mail: users-help@... >> >> >> >> > > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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