What is the the overhead of a thread dump operation

If I perform a thread dump every two minutes on the weblogic appserver
is it going to have a severe impact on the performance.
Please help.
Thank you
Madhuri

Thank you very much.
-MAdhuri
Cameron Purdy wrote:
You can time it by having a slightly higher priority thread measure the
number of milliseconds between iterations in a while(true) loop. An time
the number is >1 print it out. Run the test (in your server) and do the
thread dump.
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com
+1.617.623.5782
WebLogic Consulting Available
"Mike Reiche" <[email protected]> wrote in message
news:3b003ac1$[email protected]..
No. You won't even notice a difference. It's probably
less work than a Full GC.
Mike
Madhuri Mandava <[email protected]> wrote:
If I perform a thread dump every two minutes on the weblogic appserver
is it going to have a severe impact on the performance.
Please help.
Thank you
Madhuri

Similar Messages

What is the problem in my Thread Dump's output?

Dear all,
Below is my Thread Dump output. I can not figure out what and where is the problem of this Thread Dump's output. Could some one please give me some hints?
Thanks alot
Tu
----------------Thread Dump's Output-----------------
Full thread dump Java HotSpot(TM) Client VM (1.5.0_07-b03 mixed mode, sharing):
"TP-Monitor" daemon prio=1 tid=0xb0b14490 nid=0xfaa in Object.wait()
[0xb08fe000..0xb08fee40]
at java.lang.Object.wait(Native Method)
- waiting on <0x89433f70> (a
org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable)
at org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable.run(ThreadPool.java:559)
- locked <0x89433f70> (a
org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable)
at java.lang.Thread.run(Thread.java:595)
"TP-Processor4" daemon prio=1 tid=0xb0b13730 nid=0xfa9 runnable
[0xb097e000..0xb097efc0]
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
- locked <0x89438110> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:450)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at org.apache.jk.common.ChannelSocket.accept(ChannelSocket.java:293)
at org.apache.jk.common.ChannelSocket.acceptConnections(ChannelSocket.java:647)
at org.apache.jk.common.ChannelSocket$SocketAcceptor.runIt(ChannelSocket.java:857)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
"TP-Processor3" daemon prio=1 tid=0xb0b0f6b8 nid=0xfa8 in
Object.wait() [0xb09fe000..0xb09fef40]
at java.lang.Object.wait(Native Method)
- waiting on <0x89434250> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89434250> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"TP-Processor2" daemon prio=1 tid=0xb0b0fec8 nid=0xfa7 in
Object.wait() [0xb0a7e000..0xb0a7f0c0]
at java.lang.Object.wait(Native Method)
- waiting on <0x894342e8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x894342e8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"TP-Processor1" daemon prio=1 tid=0xb0b14978 nid=0xfa6 in
Object.wait() [0xb0afe000..0xb0aff040]
at java.lang.Object.wait(Native Method)
- waiting on <0x89434380> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89434380> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Monitor" prio=1 tid=0x08609b18 nid=0xfa5 in Object.wait()
[0xb0cc9000..0xb0cc91c0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378950> (a
org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable)
at org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable.run(ThreadPool.java:559)
- locked <0x89378950> (a
org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor25" daemon prio=1 tid=0x08608ce0 nid=0xfa4
runnable [0xb0d48000..0xb0d49140]
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
- locked <0x89010c58> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:450)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:60)
at org.apache.tomcat.util.net.PoolTcpEndpoint.acceptSocket(PoolTcpEndpoint.java:407)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:70)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor24" daemon prio=1 tid=0x086085f8 nid=0xfa3 in
Object.wait() [0xb0dc8000..0xb0dc8ec0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378ab8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89378ab8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor23" daemon prio=1 tid=0x08606dd0 nid=0xfa2 in
Object.wait() [0xb0e48000..0xb0e48e40]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378b50> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89378b50> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor22" daemon prio=1 tid=0x08605ed0 nid=0xfa1 in
Object.wait() [0xb0ec8000..0xb0ec8fc0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378be8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89378be8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor21" daemon prio=1 tid=0x08604fd0 nid=0xfa0 in
Object.wait() [0xb0f48000..0xb0f48f40]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378c80> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89378c80> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor20" daemon prio=1 tid=0x086040f0 nid=0xf9f in
Object.wait() [0xb0fc8000..0xb0fc90c0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378d18> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89378d18> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor19" daemon prio=1 tid=0x08432538 nid=0xf9e in
Object.wait() [0xb1048000..0xb1049040]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378db0> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89378db0> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor18" daemon prio=1 tid=0x08431638 nid=0xf9d in
Object.wait() [0xb10c9000..0xb10c91c0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378e48> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89378e48> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor17" daemon prio=1 tid=0x08430738 nid=0xf9c in
Object.wait() [0xb1148000..0xb1149140]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378ee0> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89378ee0> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor16" daemon prio=1 tid=0x0842f838 nid=0xf9b in
Object.wait() [0xb11c8000..0xb11c8ec0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89378f78> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89378f78> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor15" daemon prio=1 tid=0x0842e938 nid=0xf9a in
Object.wait() [0xb1248000..0xb1248e40]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379010> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379010> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor14" daemon prio=1 tid=0x0842da38 nid=0xf99 in
Object.wait() [0xb12c8000..0xb12c8fc0]
at java.lang.Object.wait(Native Method)
- waiting on <0x893790a8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x893790a8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor13" daemon prio=1 tid=0x0842cb38 nid=0xf98 in
Object.wait() [0xb1348000..0xb1348f40]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379140> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379140> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor12" daemon prio=1 tid=0x0842bc50 nid=0xf97 in
Object.wait() [0xb13c8000..0xb13c90c0]
at java.lang.Object.wait(Native Method)
- waiting on <0x893791d8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x893791d8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor11" daemon prio=1 tid=0x084f75d0 nid=0xf96 in
Object.wait() [0xb1448000..0xb1449040]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379270> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379270> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor10" daemon prio=1 tid=0x084f66d0 nid=0xf95 in
Object.wait() [0xb14c9000..0xb14c91c0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379308> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379308> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor9" daemon prio=1 tid=0x084f57d0 nid=0xf94 in
Object.wait() [0xb1548000..0xb1549140]
at java.lang.Object.wait(Native Method)
- waiting on <0x893793a0> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x893793a0> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor8" daemon prio=1 tid=0x08488970 nid=0xf93 in
Object.wait() [0xb15c8000..0xb15c8ec0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379438> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379438> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor7" daemon prio=1 tid=0x08487a70 nid=0xf92 in
Object.wait() [0xb1648000..0xb1648e40]
at java.lang.Object.wait(Native Method)
- waiting on <0x893794d0> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x893794d0> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor6" daemon prio=1 tid=0x08486b90 nid=0xf91 in
Object.wait() [0xb16c8000..0xb16c8fc0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379568> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379568> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor5" daemon prio=1 tid=0x084e3e30 nid=0xf90 in
Object.wait() [0xb1748000..0xb1748f40]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379600> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379600> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor4" daemon prio=1 tid=0x084e2f90 nid=0xf8f in
Object.wait() [0xb17c8000..0xb17c90c0]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379698> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379698> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor3" daemon prio=1 tid=0x084e2158 nid=0xf8e in
Object.wait() [0xb1848000..0xb1849040]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379730> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379730> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor2" daemon prio=1 tid=0x085e74d0 nid=0xf8d in
Object.wait() [0xb18c9000..0xb18c91c0]
at java.lang.Object.wait(Native Method)
- waiting on <0x893797c8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x893797c8> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"http-8080-Processor1" daemon prio=1 tid=0x085e6638 nid=0xf8c in
Object.wait() [0xb1948000..0xb1949140]
at java.lang.Object.wait(Native Method)
- waiting on <0x89379860> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:656)
- locked <0x89379860> (a
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
at java.lang.Thread.run(Thread.java:595)
"ContainerBackgroundProcessor[StandardEngine[Catalina]]" daemon prio=1
tid=0x083719f8 nid=0xf8b waiting on condition [0xb1a85000..0xb1a85ec0]
at java.lang.Thread.sleep(Native Method)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1547)
at java.lang.Thread.run(Thread.java:595)
"Low Memory Detector" daemon prio=1 tid=0x080a44f8 nid=0xf7f runnable
[0x00000000..0x00000000]
"CompilerThread0" daemon prio=1 tid=0x080a2f98 nid=0xf7e waiting on
condition [0x00000000..0xb21b2928]
"Signal Dispatcher" daemon prio=1 tid=0x080a2068 nid=0xf7d waiting on
condition [0x00000000..0x00000000]
"Finalizer" daemon prio=1 tid=0x0809c540 nid=0xf7c in Object.wait()
[0xb24b2000..0xb24b3040]
at java.lang.Object.wait(Native Method)
- waiting on <0x88f01de0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
- locked <0x88f01de0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
"Reference Handler" daemon prio=1 tid=0x0809a6b0 nid=0xf7b in
Object.wait() [0xb2533000..0xb25331c0]
at java.lang.Object.wait(Native Method)
- waiting on <0x88f01e60> (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:474)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
- locked <0x88f01e60> (a java.lang.ref.Reference$Lock)
"main" prio=1 tid=0x0805d1c8 nid=0xf79 runnable [0xbfbd9000..0xbfbda4f8]
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
- locked <0x8946f690> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:450)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at org.apache.catalina.core.StandardServer.await(StandardServer.java:388)
at org.apache.catalina.startup.Catalina.await(Catalina.java:615)
at org.apache.catalina.startup.Catalina.start(Catalina.java:575)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
"VM Thread" prio=1 tid=0x08097b58 nid=0xf7a runnable
"VM Periodic Task Thread" prio=1 tid=0x080a5998 nid=0xf80 waiting on condition

Thanks alot for your reply. It is a web application
using java and tomcat server. And the problem is that
sometime when I click on a button or a link than the
CPU goes to 100% and it hangs but normally it works
smoothly without any problem.This often indicates a busy retry loop somewhere. You need to acquire the thread dump when the problem occurs, but be warned that depending on the problem it may not be possible to obtain a Java-level thread dump. In that case you need to try and take an OS level thread dump - eg using pstack on solaris/linux (and there's some win32 tool as well if I recall correctly).

What is the difference between new thread and new execution?

What is the difference in creating a new thread and a new execution. Basically, what is the difference between thread and execution?

Try this link...
http://zone.ni.com/devzone/cda/tut/p/id/4823
Thanks,
PH

What is the use of OP and CA operator in PDF creation and on which factor transparency is determined?

What is the use of OP operator in PDF creation and on which factor transparency is determined?
q
0 g
0 G
1 w 10 M
/GS4 gs
/Fm3 Do
Q
PostScript code for Fm3
q
65.136 431.142 491.727 -307.179 re
W n
q
/GS0 gs
493.7399902 0 0 308.3157654 64.0563507 123.963913 cm
/Im0 Do
Q
Q
0 0 0 0 k
/GS1 gs
63.416 432.9 495 -310.32 re
f
Value of CA is 1, OPM is 1, OP is false in GS1 Extended graphic state.
whether the rectangle under the GS1 will be fully transparent or fill transparent?

This information is all in 32000-1. Please read it ALL, especially the chapter on transparency. Forum here: PDF Language and Specifications

What is the different DEALLOCATE UNUSED - datafile resize operation ?

hi everybody,
i have a question about DEALLOCATE UNUSED.
what is the different DEALLOCATE UNUSED command and datafile resize operation ?
Thanks.

Deallocate unused space clause is used to to explicitly deallocate unused space at "the end" of a segment and makes that space available for other segments within the tablespace. Internally, Oracle deallocates unused space beginning from the end of the objects (allocated space) and moving downwards toward the beginning of the object, continuing down until it reaches the high water mark (HWM).
Datafile resize add/substracts physical operating system bytes from the datafile .
Cheers :)
Renjith Madhavan

What is the overhead of Supplemental Logging?

We would like to copy data from a 600 GB Oracle database (9i) to a separate database for reporting. We want to use Data Guard in Logical Standby mode. The source database is heavily used and we can't afford a significant increase in system load (e.g. I/O activity) on that system.
To set up a Logical Standby, we need to put the JD Edwards database into Supplemental Logging mode. I am concerned that this will noticibly increase the load on the source server.
Has anyone analyzed the additional overhead of Supplemental Logging?
I have done some testing using Oracle 10.2 (Oracle XE on my computer) which indicates that when I turn on Supplemental Logging, the size of the archive logs grows by 40%. I have not yet tested this on our 9i database.
Thank you in advance for your help!
Best Regards,
Mike
=================================
The code below demonstrates the symptoms mentioned above:
RESULTS - size of archive logs generated:
- With Supplemental Logging: 120 MB
- Without: 80 MB
=================================
CREATE TABLE "EMP"
(     "EMPLOYEE_ID" NUMBER(6,0),
     "FIRST_NAME" VARCHAR2(20),
     "LAST_NAME" VARCHAR2(25) NOT NULL ENABLE,
     "EMAIL" VARCHAR2(25) NOT NULL ENABLE,
     "PHONE_NUMBER" VARCHAR2(20),
     "HIRE_DATE" DATE NOT NULL ENABLE,
     "JOB_ID" VARCHAR2(10) NOT NULL ENABLE,
     "SALARY" NUMBER(8,2),
     "COMMISSION_PCT" NUMBER(2,2),
     "MANAGER_ID" NUMBER(6,0),
     "DEPARTMENT_ID" NUMBER(4,0)
alter table emp add CONSTRAINT "EMP_EMP_ID_PK" PRIMARY KEY ("EMPLOYEE_ID")
CREATE TABLE "STAT"
(     "F1" NUMBER,
     "ID" VARCHAR2(10)
The "employee" table is from Oracle XE samples
The procedure below generates transactions to test archive log size.
To run, put the database in archive log mode. Then pop an archive log by executing
ALTER SYSTEM ARCHIVE LOG CURRENT;
To flip between running with Supplemental Logging, use one of:
ALTER DATABASE drop SUPPLEMENTAL LOG DATA (PRIMARY KEY, UNIQUE INDEX) COLUMNS;
ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (PRIMARY KEY, UNIQUE INDEX) COLUMNS;
declare
i number;
begin
i := 0;
while i < 1000
loop
delete from emp;
insert into emp select * from employees;
update emp set COMMISSION_PCT = COMMISSION_PCT * .5;
update stat set f1 = i where id = 'UPD';
commit;
if i mod 1000 = 0 then
dbms_output.put_line(i);
end if;
i := i + 1;
end loop;
end;
/***********************************************/

Unless the bottleneck of your system is related in any way to the redo log files, I don't see any risk in generating supplemental logging. A good way to find out is to look at a Statspack report, and see which events are the top 5 time-wise.
Daniel

What is the best cross server thread package that can be used with JSF?

Hi all,
I need to basically, do some clean up after timeout. I don't mean a session timeout. I just want to start from thread/process that does something every 30 seconds. Later, I would want to stop this thread.
I don't know much about J2ee, but there must be some why to do this kind of thing. Please, give me some sort of information about it.
Thanks,
Grae

I don't if you guys have seen ITG Edge for iPhone 6 from Indiegogo, but I think they seem pretty legit in terms of covering the entire screen without making any change to the original design. I've seen the videos from their campaign.
I think there's still room for the promotion of $30 for pre-order right now.
http://igg.me/at/itg-edge

What is the Default WorkManager Max-Threads-Constraint default value?

Hello,
I know that when I create a new WorkManager the default value for the Max-Threads-Constraint is -1.
But I wonder if this is the case also for the default value of the Default Work Manager?
I would assume that the Default WorkManager has other values set. Couldn't find any reference to that.
Thank you in advance.

It is called as Self-Tuning Work Manager.
It means, it doesnt have a specific value. It varies according to the demand in a specific time.
Kinds,
Gabriel Abelha

KEA0 what is the best way to create new Operating concern

Hello :
Please advise
1. what is best way to create new OP concern
copy from template or create data structure from scratch?
2. I try to copy from OP concern = IDEA but when click change DATA STRUTURE -I see only CE1xxx but I not see CE2xxxx, CE3xxxx, CE4xxxx ...
pls advise - how to? can I change data structure on CE2, CE3....
Thx in advance.
Manthana

If your data structure will be the same then do a copy. if the data structures are different then create from scratch ( or modify after copy). Copy saves time so you don't have to start from scratch.

What's the maximum # of threads?

Support for asynchronous I/O (in HTTPService and WebService)
kinda implies that the Player has a thread pool that it gets a
spare thread from each time I do a send() on one of these
components. Each allocated thread will block until it gets a
response. If I don't get any responses (perhaps because it's
long-lived) how many threads can I obtain from the pool before the
Player runs out of threads (or is there no maximum or is it a
start-up parameter)?

Anakin1989 wrote:
Hi,
I'm working on a pretty big program and i need a lot of threads to make it run well (it's an audio player and, of course, i don't need people to wait when, for example, they save a playlist). So, i put some of these tasks on different threads, plus others that i didn't need for making the program run faster, but they are there just to make the program run. Now i have at least 4 threads running at the same time and, in some cases, there are even 6 or 7. Is it too much? It's my first big program (it's just for fun but i still want it to run well) and i didn't need so many threads before. What's the maximum number of threads you'd recommend me to have?
Thanks.Are you experiencing any problems with the number of Threads you have? If not, stop worrying. On the other hand, are you sure you need all of them? There are alternatives to Threading, such as SwingWorker and Timer that might be able to help you out.
One thing you better make sure of is that you're not doing any Swing work off of the EDT, or doing things like sleeping or time-consuming work on the EDT.

What is the diff'ce while creating a thread

what is the difference while creating thread using extends Thread, and implements Runnable interface. which one is perform better.

and for when to use which again depends upon if the
e class that you wish to make threaded already
extends from some other class. If so is the case the
only alternative you are left with is to implement it
from Runnable interface. ( as java does not supports
multiple inheritance ).That's a bad advice. You should only extend thread if you actually want to change the behaviour, or extend the functionallity of the thread class. You should not extend the thread class just because it's convinient.
/Kaj

T-code to confirm the Overhead cost ?

Hi
Can any one let me the T-code to confirm the Overhead cost in a plant maintenance order.
I have some overheads under plan cost. How can i bring the Plan cost to Actual cost for overheads.
venkat

hi
on what basis the overheads are calculated
say 100 $ is actual cost in order what is the overhead on order
what is the formulae to be used & set this formulae
Regards
chandrashekhar

Setting the right number of thread count

Hi,
What's the right number of thread for a server that has 2 CPU? I know the default setting for Dev is 15 and Production is 25. From what I read in the Performance Tuning Guide, it should be somewhere around the number of CPUs on the machine? Is that right? Or keep the default?

Statement st = con.createStatement();
st.setFetchSize(no_of_rows_here);
ResultSet rs = st.executeQuery(query);Sudha

What si the difference between crete and create insert operations.

Hi
In ADF 11g,what is the difference between create and createinsert operations.
if anyone knows plz tell me.Any document about this plz provide me.
Any help is appreciated.
Sailaja.

Hi,
CreateInsert: Creates a new row that becomes the current row, and inserts the
new blank row into the data source.
Create: Creates a new row that becomes the current row, but does not insert it.
--> normaly you would use createinsert
Doc you can find here (search for Createinsert): http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974.pdf
br
Peter

Generate thread dump without sending ctrl-break on Win32

I have a server application running as a service on Win2k (we use Service+ to do this). The output of the console is piped to a text file which we can monitor. But, I can't figure out how to generate a thread dump while running in this configuration. Does anyone know if Service+ can be configured to do this, or if it can be achieved programmatically (how does Sun spit out the thread info when it gets the request).
Thanks,
Larry

If you are running a java application on a Windows server. You can press Ctrl-Break, and a thread dump will be displayed in the console. This thread dump is a list of all the threads running in the JVM, and the line of code they are each executing.
We'd like to be able to generate this thread dump some other way than pressing Ctrl-Break, because we don't have a console, our application is running as a service using Service .
Thanks for the reply,
Larry0AThanks for the reply,
Larry

What is the the overhead of a thread dump operation

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