Comments on: Monitoring Java garbage collection with jstat http://prefetch.net/blog/index.php/2008/01/16/monitoring-garbage-collection-with-jstat/ Blog O' Matty Fri, 04 May 2012 19:58:36 +0000 hourly 1 By: jtayl22 http://prefetch.net/blog/index.php/2008/01/16/monitoring-garbage-collection-with-jstat/comment-page-1/#comment-806084 jtayl22 Wed, 24 Jun 2009 20:19:12 +0000 http://prefetch.net/blog/index.php/2008/01/16/monitoring-garabge-collection-with-jstat/#comment-806084 In response to May's question about monitoring threads on Solaris: (1) In "prstat" the last number of each column is the NLWP (number light weight processes aka threads) that are currently active. (2) "prstat -mLp " will show the current threads for one process. The last column is the LWPID (light weight process ID) (3) LWPID's increment by one, hence the highest LWPID indicates how many threads have been launched since process creation. (4) "ps -fLp " gives similar info to #3 (5) View system calls for one thread with "truss -f -p 10135/997" where 10135 is the PID & 997 is the LWPID In response to May’s question about monitoring threads on Solaris:
(1) In “prstat” the last number of each column is the NLWP (number light weight processes aka threads) that are currently active.
(2) “prstat -mLp ” will show the current threads for one process. The last column is the LWPID (light weight process ID)
(3) LWPID’s increment by one, hence the highest LWPID indicates how many threads have been launched since process creation.
(4) “ps -fLp ” gives similar info to #3
(5) View system calls for one thread with “truss -f -p 10135/997″ where 10135 is the PID & 997 is the LWPID

]]> By: may http://prefetch.net/blog/index.php/2008/01/16/monitoring-garbage-collection-with-jstat/comment-page-1/#comment-788455 may Fri, 08 May 2009 07:41:17 +0000 http://prefetch.net/blog/index.php/2008/01/16/monitoring-garabge-collection-with-jstat/#comment-788455 Thank you for nice explanation of jstat. Is there anyway to get the details of threads spawned by a java process ( like 'top' tool). e.g.: Tomcat starts many threads. So if I pass the tomcat's (java) process id to a tool, I can get details like, how many threads it has created so far, etc. Thank you. Thank you for nice explanation of jstat.

Is there anyway to get the details of threads spawned by a java process ( like ‘top’ tool).

e.g.: Tomcat starts many threads. So if I pass the tomcat’s (java) process id to a tool, I can get details like, how many threads it has created so far, etc.

Thank you.

]]> By: vikram http://prefetch.net/blog/index.php/2008/01/16/monitoring-garbage-collection-with-jstat/comment-page-1/#comment-612078 vikram Fri, 19 Sep 2008 11:35:55 +0000 http://prefetch.net/blog/index.php/2008/01/16/monitoring-garabge-collection-with-jstat/#comment-612078 nice one nice one

]]> By: dario the boring http://prefetch.net/blog/index.php/2008/01/16/monitoring-garbage-collection-with-jstat/comment-page-1/#comment-571442 dario the boring Tue, 12 Aug 2008 15:11:36 +0000 http://prefetch.net/blog/index.php/2008/01/16/monitoring-garabge-collection-with-jstat/#comment-571442 what is the unit of expression on young garbage coll time? segs? millisegs? what is the unit of expression on young garbage coll time? segs? millisegs?

]]> By: damien31830 http://prefetch.net/blog/index.php/2008/01/16/monitoring-garbage-collection-with-jstat/comment-page-1/#comment-509806 damien31830 Wed, 02 Jul 2008 16:37:17 +0000 http://prefetch.net/blog/index.php/2008/01/16/monitoring-garabge-collection-with-jstat/#comment-509806 Yes jconsole is very powerful but it only can be used on version 1.5 & more .... But i don't know if jstat is included in 1.4 version, i have to test! If you have some news or experience concerning the monitoring of GB answer me . Thanks !!! Yes jconsole is very powerful but it only can be used on version 1.5 & more ….
But i don’t know if jstat is included in 1.4 version, i have to test!
If you have some news or experience concerning the monitoring of GB answer me .
Thanks !!!

]]> By: Brian Bent http://prefetch.net/blog/index.php/2008/01/16/monitoring-garbage-collection-with-jstat/comment-page-1/#comment-210045 Brian Bent Thu, 24 Jan 2008 19:28:18 +0000 http://prefetch.net/blog/index.php/2008/01/16/monitoring-garabge-collection-with-jstat/#comment-210045 Matt - I think you have a great site out here. Keep up the good work. Another utility that I think worth mentioning is jconsole. JConsole allows you to visually see what jstat is giving you. I do a lot of work on the Oracle E-Business Suite and my utilities of choice for troubleshooting the application servers are jps, jstat and JConsole. Brian Matt – I think you have a great site out here. Keep up the good work.

Another utility that I think worth mentioning is jconsole. JConsole allows you to visually see what jstat is giving you. I do a lot of work on the Oracle E-Business Suite and my utilities of choice for troubleshooting the application servers are jps, jstat and JConsole.

Brian

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