Comments on: Java VisualVM – Developer`s Nightmare is Over http://www.taranfx.com/java-visualvm Your gateway to Technology, Redefined. Sun, 14 Mar 2010 19:23:44 +0000 http://wordpress.org/?v=2.9 hourly 1 By: Google Speed Tracer: Speedup the Web Apps http://www.taranfx.com/java-visualvm/comment-page-1#comment-7386 Google Speed Tracer: Speedup the Web Apps Wed, 09 Dec 2009 16:52:02 +0000 http://www.taranfx.com/blog/?p=930#comment-7386 [...] you have used Java’s VisualVM, you will find Speed Tracer equally competent on the web apps [...] [...] you have used Java’s VisualVM, you will find Speed Tracer equally competent on the web apps [...]

]]> By: god http://www.taranfx.com/java-visualvm/comment-page-1#comment-7784 god Fri, 27 Nov 2009 11:18:55 +0000 http://www.taranfx.com/blog/?p=930#comment-7784 a good news a good news

]]> By: god http://www.taranfx.com/java-visualvm/comment-page-1#comment-7011 god Fri, 27 Nov 2009 05:18:55 +0000 http://www.taranfx.com/blog/?p=930#comment-7011 a good news a good news

]]> By: comprar r4 nintendo ds http://www.taranfx.com/java-visualvm/comment-page-1#comment-6094 comprar r4 nintendo ds Wed, 04 Nov 2009 22:34:03 +0000 http://www.taranfx.com/blog/?p=930#comment-6094 I think this is a great article because it contain very useful information.Thanks guy's for sharing this valuable information. keep it up..... I think this is a great article because it contain very useful information.Thanks guy's for sharing this valuable information. keep it up…..

]]> By: Henno http://www.taranfx.com/java-visualvm/comment-page-1#comment-5676 Henno Sun, 18 Oct 2009 10:03:30 +0000 http://www.taranfx.com/blog/?p=930#comment-5676 I think a good profiler needs to be able to (almost) automatically detect deadlocks and memory leaks. For the first JVisualVM does an excellent job (as does the Eclipse debugger when you show monitor status).<br><br>I already used it to find out why one of our unit tests failed; turned out to be a deadlock in ActiveMQ which (I think...) only shows up when it closes so it's of low concern. It's a relief to find out it was not in our own code...<br><br>I have no experience in using it for finding memory leaks, might be hard. The Eclipse profiler plugin did a great job for me on a memory leak before by showing why a certain object did not get garbage collected.<br><br>Such tools can be great time savers for these kind of hard to localize bugs. I think a good profiler needs to be able to (almost) automatically detect deadlocks and memory leaks. For the first JVisualVM does an excellent job (as does the Eclipse debugger when you show monitor status).

I already used it to find out why one of our unit tests failed; turned out to be a deadlock in ActiveMQ which (I think…) only shows up when it closes so it's of low concern. It's a relief to find out it was not in our own code…

I have no experience in using it for finding memory leaks, might be hard. The Eclipse profiler plugin did a great job for me on a memory leak before by showing why a certain object did not get garbage collected.

Such tools can be great time savers for these kind of hard to localize bugs.

]]> By: octix http://www.taranfx.com/java-visualvm/comment-page-1#comment-5646 octix Sun, 18 Oct 2009 02:15:07 +0000 http://www.taranfx.com/blog/?p=930#comment-5646 Sadly, but it doesn't work with IBM JDK :( Sadly, but it doesn't work with IBM JDK :(

]]> By: Peter http://www.taranfx.com/java-visualvm/comment-page-1#comment-5644 Peter Sat, 17 Oct 2009 18:34:04 +0000 http://www.taranfx.com/blog/?p=930#comment-5644 William you probably even didn't try the new version before saying the numbers. VisualVM 1.2 seems to have introduced a sampling profiler (currently only a test build is available) which doesn't require any probes etc. and has no overhead. I'm saying it's 3 times faster than JXInsight, just go and try it yourself - you can be sure you'll have access to it since it's free.<br><br>BTW why do you think I don't have access to the latest JXInsight? Are you talking about some super-secret relase which do you use for comparing with other tools? William you probably even didn't try the new version before saying the numbers. VisualVM 1.2 seems to have introduced a sampling profiler (currently only a test build is available) which doesn't require any probes etc. and has no overhead. I'm saying it's 3 times faster than JXInsight, just go and try it yourself – you can be sure you'll have access to it since it's free.

BTW why do you think I don't have access to the latest JXInsight? Are you talking about some super-secret relase which do you use for comparing with other tools?

]]> By: William Louth http://www.taranfx.com/java-visualvm/comment-page-1#comment-5643 William Louth Sat, 17 Oct 2009 08:43:00 +0000 http://www.taranfx.com/blog/?p=930#comment-5643 Peter what exactly are you talking about. 3 times faster. You do not even have access to JXInsight unless you are talking about a version 2 years old and referring to tracing. JXInsight's Probes technology has an overhead of 1 ns compared to Visual VM with 600 ns per execution profiled method. 600 times faster. So you are saying that Visual VM has from 1.1 to 1.2 reduced its overhead by 1800x. Peter what exactly are you talking about. 3 times faster. You do not even have access to JXInsight unless you are talking about a version 2 years old and referring to tracing. JXInsight's Probes technology has an overhead of 1 ns compared to Visual VM with 600 ns per execution profiled method. 600 times faster. So you are saying that Visual VM has from 1.1 to 1.2 reduced its overhead by 1800x.

]]> By: Peter http://www.taranfx.com/java-visualvm/comment-page-1#comment-5642 Peter Sat, 17 Oct 2009 07:40:13 +0000 http://www.taranfx.com/blog/?p=930#comment-5642 I've just tried it, new VisualVM 1.2 is about 3 times faster than JXInsight and the sampling no more breaks the application! Perfectly usable in production and is free. I've just tried it, new VisualVM 1.2 is about 3 times faster than JXInsight and the sampling no more breaks the application! Perfectly usable in production and is free.

]]> By: William Louth http://www.taranfx.com/java-visualvm/comment-page-1#comment-5641 William Louth Sat, 17 Oct 2009 05:54:52 +0000 http://www.taranfx.com/blog/?p=930#comment-5641 Assuming you are also interested in production usage which is not possible with the above mentions tools you should really try out JXInsight. Hundreds of times faster and more extensible. And Seam aware.<br><br><a href="http://blog.jinspired.com/?p=738" rel="nofollow">http://blog.jinspired.com/?p=738</a> Assuming you are also interested in production usage which is not possible with the above mentions tools you should really try out JXInsight. Hundreds of times faster and more extensible. And Seam aware.

http://blog.jinspired.com/?p=738

]]> By: ericyung http://www.taranfx.com/java-visualvm/comment-page-1#comment-5645 ericyung Fri, 16 Oct 2009 22:22:01 +0000 http://www.taranfx.com/blog/?p=930#comment-5645 is it the same thing as profiler bundle in netbean ? is it the same thing as profiler bundle in netbean ?

]]> By: David http://www.taranfx.com/java-visualvm/comment-page-1#comment-5640 David Fri, 16 Oct 2009 14:28:30 +0000 http://www.taranfx.com/blog/?p=930#comment-5640 I've also used Visual VM successfully in the past, but it doesn't work for all applications. For example, we just tried to use Visual VM with a Seam web app, but when Visual VM rewrote the classes at runtime, it did so in a way that caused the app to start throwing errors. We tried Yourkit instead, and didn't see the issue. (I have no relation to yourkit--we're about halfway through our 15 day trial of their software). I've also used Visual VM successfully in the past, but it doesn't work for all applications. For example, we just tried to use Visual VM with a Seam web app, but when Visual VM rewrote the classes at runtime, it did so in a way that caused the app to start throwing errors. We tried Yourkit instead, and didn't see the issue. (I have no relation to yourkit–we're about halfway through our 15 day trial of their software).

]]> By: fuentesjr http://www.taranfx.com/java-visualvm/comment-page-1#comment-5600 fuentesjr Thu, 15 Oct 2009 05:29:20 +0000 http://www.taranfx.com/blog/?p=930#comment-5600 Perhaps not Open Source but Oracle offers JRockit Mission Control (<a href="http://www.oracle.com/technology/products/jrockit/missioncontrol/tutorials/gettingstartedtutorial/index.html" rel="nofollow">http://www.oracle.com/technology/products/jrock...</a>) free for evaluation and development. Perhaps not Open Source but Oracle offers JRockit Mission Control (http://www.oracle.com/technology/products/jrock...) free for evaluation and development.

]]> By: sanity http://www.taranfx.com/java-visualvm/comment-page-1#comment-5596 sanity Thu, 15 Oct 2009 02:22:27 +0000 http://www.taranfx.com/blog/?p=930#comment-5596 Its a shame its so hard to tunnel VisualVM over a ssh connection (due to the fact that it needs to open multiple connections on hard-to-predict ports). Its a shame its so hard to tunnel VisualVM over a ssh connection (due to the fact that it needs to open multiple connections on hard-to-predict ports).

]]> By: webspherehelp http://www.taranfx.com/java-visualvm/comment-page-1#comment-3081 webspherehelp Mon, 27 Jul 2009 01:19:19 +0000 http://www.taranfx.com/blog/?p=930#comment-3081 Check on how to use visual vm through ssh proxy in production systems <a href="http://webspherehelp.blogspot.com/2009/07/visualvm-remote-application-monitoring.html" rel="nofollow">http://webspherehelp.blogspot.com/2009/07/visualvm-remote-application-monitoring.html</a> Check on how to use visual vm through ssh proxy in production systems http://webspherehelp.blogspot.com/2009/07/visualvm-remote-application-monitoring.html

]]> By: Why choose JavaFX. How to Code. Benchmark Graphics, CPU, Memory | Taranfx: Technology Blog http://www.taranfx.com/java-visualvm/comment-page-1#comment-1998 Why choose JavaFX. How to Code. Benchmark Graphics, CPU, Memory | Taranfx: Technology Blog Tue, 30 Jun 2009 23:00:23 +0000 http://www.taranfx.com/blog/?p=930#comment-1998 [...] Netbeans 6.5, VisualVM [...] [...] Netbeans 6.5, VisualVM [...]

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