If you're unfortunate enough to use Solaris in production, you can at least console yourself with some of the excellent performance monitoring tools the OS supports. We recently had some performance issues which we needed to diagnose on a production server -- i.e. no profiler.
man prstat will explain what the columns mean. The individual threads are in the last column; you can get out a stack trace from them via pstack. In this case, I could run pstack 2108/52 to see what the top thread looks like:
top == prstat
Your first point of call for CPU monitoring is normally top, which doesn't exist on Solaris (of course). Use prstat instead. It's basically the same in terms of information.Individual Java Thread Monitoring
prstat has another trick -- you can use it to get an individual breakdown of the threads in your process. Use:prstat -mvL -p <processid>To get output like:
PID USERNAME USR SYS TRP TFL DFL LCK SLP LAT VCX ICX SCL SIG PROCESS/LWPID 2108 stuart 1.7 0.0 0.0 0.0 0.0 98 0.0 0.0 5 2 5 0 java/52 2108 stuart 0.0 0.0 0.0 0.0 0.0 0.0 100 0.0 100 0 100 0 java/18 2108 stuart 0.0 0.0 0.0 0.0 0.0 0.0 100 0.0 50 0 50 0 java/28 2108 stuart 0.0 0.0 0.0 0.0 0.0 0.0 100 0.0 5 0 5 0 java/21 2108 stuart 0.0 0.0 0.0 0.0 0.0 100 0.0 0.0 5 1 5 0 java/8 2108 stuart 0.0 0.0 0.0 0.0 0.0 100 0.0 0.0 1 0 1 0 java/20 2108 stuart 0.0 0.0 0.0 0.0 0.0 100 0.0 0.0 2 0 2 0 java/85
man prstat will explain what the columns mean. The individual threads are in the last column; you can get out a stack trace from them via pstack. In this case, I could run pstack 2108/52 to see what the top thread looks like:
----------------- lwp# 2108 / thread# 52 -------------------- fc829624 * *com/sun/org/apache/xml/internal/dtm/ref/dom2dtm/DOM2DTM.nextNode()Z [compiled] fc2c5bb8 * *com/sun/org/apache/xml/internal/dtm/ref/dom2dtm/DOM2DTM.getHandleFromNode(Lorg/w3c/dom/Node;)I [compiled] +50 (line 1341) fca4f1b8 * *com/sun/org/apache/xml/internal/dtm/ref/dom2dtm/DOM2DTM.getHandleOfNode(Lorg/w3c/dom/Node;)I [compiled] +89 (line 1409) fca4f1b8 * *com/sun/org/apache/xml/internal/dtm/ref/DTMManagerDefault.getDTMHandleFromNode(Lorg/w3c/dom/Node;)I+219 (line 1135) fca1088c * *com/sun/org/apache/xpath/internal/XPathContext.getDTMHandleFromNode(Lorg/w3c/dom/Node;)I [compiled] +6 (line 364)
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