Re: Tomcat 4.x and Java Processes
Are you using Linux? Linux shows in-process threads as processes. If you are running Linux, then you are seeing threads within the Java process. You would expect to see a number of threads even with your simple config. Ben Ricker On Tue, 2003-01-07 at 14:07, Troy J. Kelley wrote: I've been looking all over for the answer to this and can't seem to find a good answer. My basic question is that when I start up a *very* basic tomcat config (JMX Support, HTTP Listener, one engine, one host, once context) I get several java processes that look the same: root 5865 0.0 5.7 227380 29548 ? S15:02 0:02 /usr/java/jdk/bin/java -Djava.endorsed.dirs= -classpath /usr/java/jdk/lib/tools.jar:/var/tomcat4/bin/bootstrap.jar -Dcatalina.base=/var/tomcat4 -Dcatalina.home=/var/tomcat4 -Djava.io.tmpdir=/var/tomcat4/temp org.apache.catalina.startup.Bootstrap start So, why are there so many processes? I set minProcessors=1 maxProcessors=1 for the Coyote HTTP connector to reduce the number of JVMs related to this... In the WebSphere world a JVM is synonymous with an Application Server, which services the requests for the modules (WAR/EAR) installed into the appserver. Any insight would be greatly appreciated. -Troy [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Ben Ricker [EMAIL PROTECTED] Wellinx.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Tomcat 4.x and Java Processes
Yes, sorry, I forgot to mention that. Are there options for threading on linux? I think on Solaris, you can do green or native threads. If so, would a change in this setting reduce the JVM to a single pid? Thanks for the quick reply! -Troy -Original Message- From: Ben Ricker [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 3:13 PM To: Tomcat Users List Subject: Re: Tomcat 4.x and Java Processes Are you using Linux? Linux shows in-process threads as processes. If you are running Linux, then you are seeing threads within the Java process. You would expect to see a number of threads even with your simple config. Ben Ricker On Tue, 2003-01-07 at 14:07, Troy J. Kelley wrote: I've been looking all over for the answer to this and can't seem to find a good answer. My basic question is that when I start up a *very* basic tomcat config (JMX Support, HTTP Listener, one engine, one host, once context) I get several java processes that look the same: root 5865 0.0 5.7 227380 29548 ? S15:02 0:02 /usr/java/jdk/bin/java -Djava.endorsed.dirs= -classpath /usr/java/jdk/lib/tools.jar:/var/tomcat4/bin/bootstrap.jar -Dcatalina.base=/var/tomcat4 -Dcatalina.home=/var/tomcat4 -Djava.io.tmpdir=/var/tomcat4/temp org.apache.catalina.startup.Bootstrap start So, why are there so many processes? I set minProcessors=1 maxProcessors=1 for the Coyote HTTP connector to reduce the number of JVMs related to this... In the WebSphere world a JVM is synonymous with an Application Server, which services the requests for the modules (WAR/EAR) installed into the appserver. Any insight would be greatly appreciated. -Troy [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Ben Ricker [EMAIL PROTECTED] Wellinx.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Tomcat 4.x and Java Processes
Thanks. Nope, doesn't really bother me at all just trying to learn a bit more is all. The thing that got me thinking about this in the first place is that on an older version of Tomcat (4.1.12?) the init.d script for stopping tomcat supplied with the RPM wasn't killing off all of the processes... I'll move on now - thanks Ben. -Troy -Original Message- From: Ben Ricker [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 3:31 PM To: 'Tomcat Users List' Subject: RE: Tomcat 4.x and Java Processes On Tue, 2003-01-07 at 14:21, Troy J. Kelley wrote: Yes, sorry, I forgot to mention that. Are there options for threading on linux? I think on Solaris, you can do green or native threads. If so, would a change in this setting reduce the JVM to a single pid? Thanks for the quick reply! -Troy Nope. An application like Tomcat, or the JVM for that matter, will always be multi-threaded. Green or Native has to do with how exactly the threads are created (I forgot the exact differences). What is the big deal with seeing multiple Java processes? Are you worried about RAM? Note that the threads all have the same memory allocation. You do not add those up; the shared memory is just that: shared amongst all of the threads. I would just forget about it and move on. You will not get a single PID. Well, I tale that back. Never say never when it comes to Unix; you might be able to list the Parent PIDS only by messing with the 'ps' options. I have never done that myself, so I suggest, if you feel the need, to look through the man pages for 'ps'. HTH, Ben Ricker -Original Message- From: Ben Ricker [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 3:13 PM To: Tomcat Users List Subject: Re: Tomcat 4.x and Java Processes Are you using Linux? Linux shows in-process threads as processes. If you are running Linux, then you are seeing threads within the Java process. You would expect to see a number of threads even with your simple config. Ben Ricker On Tue, 2003-01-07 at 14:07, Troy J. Kelley wrote: I've been looking all over for the answer to this and can't seem to find a good answer. My basic question is that when I start up a *very* basic tomcat config (JMX Support, HTTP Listener, one engine, one host, once context) I get several java processes that look the same: root 5865 0.0 5.7 227380 29548 ? S15:02 0:02 /usr/java/jdk/bin/java -Djava.endorsed.dirs= -classpath /usr/java/jdk/lib/tools.jar:/var/tomcat4/bin/bootstrap.jar -Dcatalina.base=/var/tomcat4 -Dcatalina.home=/var/tomcat4 -Djava.io.tmpdir=/var/tomcat4/temp org.apache.catalina.startup.Bootstrap start So, why are there so many processes? I set minProcessors=1 maxProcessors=1 for the Coyote HTTP connector to reduce the number of JVMs related to this... In the WebSphere world a JVM is synonymous with an Application Server, which services the requests for the modules (WAR/EAR) installed into the appserver. Any insight would be greatly appreciated. -Troy [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Ben Ricker [EMAIL PROTECTED] Wellinx.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.x and Java Processes
Dear friends, I think its valuable to mention that when you use green threads you'll loose the benefits of SMP processing, I mean, your threads will run in a single processor even if your machine has more than one. Troy J. Kelley wrote: Yes, sorry, I forgot to mention that. Are there options for threading on linux? I think on Solaris, you can do green or native threads. If so, would a change in this setting reduce the JVM to a single pid? Thanks for the quick reply! -Troy -Original Message- From: Ben Ricker [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 3:13 PM To: Tomcat Users List Subject: Re: Tomcat 4.x and Java Processes Are you using Linux? Linux shows in-process threads as processes. If you are running Linux, then you are seeing threads within the Java process. You would expect to see a number of threads even with your simple config. Ben Ricker On Tue, 2003-01-07 at 14:07, Troy J. Kelley wrote: I've been looking all over for the answer to this and can't seem to find a good answer. My basic question is that when I start up a *very* basic tomcat config (JMX Support, HTTP Listener, one engine, one host, once context) I get several java processes that look the same: root 5865 0.0 5.7 227380 29548 ? S15:02 0:02 /usr/java/jdk/bin/java -Djava.endorsed.dirs= -classpath /usr/java/jdk/lib/tools.jar:/var/tomcat4/bin/bootstrap.jar -Dcatalina.base=/var/tomcat4 -Dcatalina.home=/var/tomcat4 -Djava.io.tmpdir=/var/tomcat4/temp org.apache.catalina.startup.Bootstrap start So, why are there so many processes? I set minProcessors=1 maxProcessors=1 for the Coyote HTTP connector to reduce the number of JVMs related to this... In the WebSphere world a JVM is synonymous with an Application Server, which services the requests for the modules (WAR/EAR) installed into the appserver. Any insight would be greatly appreciated. -Troy [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Ben Ricker [EMAIL PROTECTED] Wellinx.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Wagner Santana Analista de Sistemas - TIM Av. Conde da Boa Vista, 800 081 3216-2713081 99136661 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Tomcat 4.x and Java Processes
On Linux ps -fx will not show the tomcat processes if tomcat is run under a different account. I think ps -fx just shows processes running under root??? To see all processes, I had to do ps -fxa to see my tomcat processes running under the tomcat4 account. Mike -Original Message- From: Rob A. Augustinus [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 3:34 PM To: 'Tomcat Users List' Subject: RE: Tomcat 4.x and Java Processes Not sure if someone mentioned this but you cat try ps fx To see which process is the parent and which are the childs.. Rob -Original Message- From: Troy J. Kelley [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 12:21 To: 'Tomcat Users List' Subject: RE: Tomcat 4.x and Java Processes Yes, sorry, I forgot to mention that. Are there options for threading on linux? I think on Solaris, you can do green or native threads. If so, would a change in this setting reduce the JVM to a single pid? Thanks for the quick reply! -Troy -Original Message- From: Ben Ricker [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 3:13 PM To: Tomcat Users List Subject: Re: Tomcat 4.x and Java Processes Are you using Linux? Linux shows in-process threads as processes. If you are running Linux, then you are seeing threads within the Java process. You would expect to see a number of threads even with your simple config. Ben Ricker On Tue, 2003-01-07 at 14:07, Troy J. Kelley wrote: I've been looking all over for the answer to this and can't seem to find a good answer. My basic question is that when I start up a *very* basic tomcat config (JMX Support, HTTP Listener, one engine, one host, once context) I get several java processes that look the same: root 5865 0.0 5.7 227380 29548 ? S15:02 0:02 /usr/java/jdk/bin/java -Djava.endorsed.dirs= -classpath /usr/java/jdk/lib/tools.jar:/var/tomcat4/bin/bootstrap.jar -Dcatalina.base=/var/tomcat4 -Dcatalina.home=/var/tomcat4 -Djava.io.tmpdir=/var/tomcat4/temp org.apache.catalina.startup.Bootstrap start So, why are there so many processes? I set minProcessors=1 maxProcessors=1 for the Coyote HTTP connector to reduce the number of JVMs related to this... In the WebSphere world a JVM is synonymous with an Application Server, which services the requests for the modules (WAR/EAR) installed into the appserver. Any insight would be greatly appreciated. -Troy [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Ben Ricker [EMAIL PROTECTED] Wellinx.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Tomcat 4.x and Java Processes
On Tue, 2003-01-07 at 14:21, Troy J. Kelley wrote: Yes, sorry, I forgot to mention that. Are there options for threading on linux? I think on Solaris, you can do green or native threads. If so, would a change in this setting reduce the JVM to a single pid? Thanks for the quick reply! -Troy Nope. An application like Tomcat, or the JVM for that matter, will always be multi-threaded. Green or Native has to do with how exactly the threads are created (I forgot the exact differences). What is the big deal with seeing multiple Java processes? Are you worried about RAM? Note that the threads all have the same memory allocation. You do not add those up; the shared memory is just that: shared amongst all of the threads. I would just forget about it and move on. You will not get a single PID. Well, I tale that back. Never say never when it comes to Unix; you might be able to list the Parent PIDS only by messing with the 'ps' options. I have never done that myself, so I suggest, if you feel the need, to look through the man pages for 'ps'. HTH, Ben Ricker -Original Message- From: Ben Ricker [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 3:13 PM To: Tomcat Users List Subject: Re: Tomcat 4.x and Java Processes Are you using Linux? Linux shows in-process threads as processes. If you are running Linux, then you are seeing threads within the Java process. You would expect to see a number of threads even with your simple config. Ben Ricker On Tue, 2003-01-07 at 14:07, Troy J. Kelley wrote: I've been looking all over for the answer to this and can't seem to find a good answer. My basic question is that when I start up a *very* basic tomcat config (JMX Support, HTTP Listener, one engine, one host, once context) I get several java processes that look the same: root 5865 0.0 5.7 227380 29548 ? S15:02 0:02 /usr/java/jdk/bin/java -Djava.endorsed.dirs= -classpath /usr/java/jdk/lib/tools.jar:/var/tomcat4/bin/bootstrap.jar -Dcatalina.base=/var/tomcat4 -Dcatalina.home=/var/tomcat4 -Djava.io.tmpdir=/var/tomcat4/temp org.apache.catalina.startup.Bootstrap start So, why are there so many processes? I set minProcessors=1 maxProcessors=1 for the Coyote HTTP connector to reduce the number of JVMs related to this... In the WebSphere world a JVM is synonymous with an Application Server, which services the requests for the modules (WAR/EAR) installed into the appserver. Any insight would be greatly appreciated. -Troy [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Ben Ricker [EMAIL PROTECTED] Wellinx.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.x and Java Processes
On Tue, 7 Jan 2003, Troy J. Kelley wrote: Date: Tue, 7 Jan 2003 15:07:03 -0500 From: Troy J. Kelley [EMAIL PROTECTED] Reply-To: Tomcat Users List [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Tomcat 4.x and Java Processes I've been looking all over for the answer to this and can't seem to find a good answer. My basic question is that when I start up a *very* basic tomcat config (JMX Support, HTTP Listener, one engine, one host, once context) I get several java processes that look the same: root 5865 0.0 5.7 227380 29548 ? S15:02 0:02 They are not processes, they are threads. The ps on Linux lies to you. Craig -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Tomcat 4.x and Java Processes
Not sure if someone mentioned this but you cat try ps fx To see which process is the parent and which are the childs.. Rob -Original Message- From: Troy J. Kelley [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 12:21 To: 'Tomcat Users List' Subject: RE: Tomcat 4.x and Java Processes Yes, sorry, I forgot to mention that. Are there options for threading on linux? I think on Solaris, you can do green or native threads. If so, would a change in this setting reduce the JVM to a single pid? Thanks for the quick reply! -Troy -Original Message- From: Ben Ricker [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 3:13 PM To: Tomcat Users List Subject: Re: Tomcat 4.x and Java Processes Are you using Linux? Linux shows in-process threads as processes. If you are running Linux, then you are seeing threads within the Java process. You would expect to see a number of threads even with your simple config. Ben Ricker On Tue, 2003-01-07 at 14:07, Troy J. Kelley wrote: I've been looking all over for the answer to this and can't seem to find a good answer. My basic question is that when I start up a *very* basic tomcat config (JMX Support, HTTP Listener, one engine, one host, once context) I get several java processes that look the same: root 5865 0.0 5.7 227380 29548 ? S15:02 0:02 /usr/java/jdk/bin/java -Djava.endorsed.dirs= -classpath /usr/java/jdk/lib/tools.jar:/var/tomcat4/bin/bootstrap.jar -Dcatalina.base=/var/tomcat4 -Dcatalina.home=/var/tomcat4 -Djava.io.tmpdir=/var/tomcat4/temp org.apache.catalina.startup.Bootstrap start So, why are there so many processes? I set minProcessors=1 maxProcessors=1 for the Coyote HTTP connector to reduce the number of JVMs related to this... In the WebSphere world a JVM is synonymous with an Application Server, which services the requests for the modules (WAR/EAR) installed into the appserver. Any insight would be greatly appreciated. -Troy [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Ben Ricker [EMAIL PROTECTED] Wellinx.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
