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Java Forum / General / August 2007slowdown in JDK 1.6
I have seen a pattern with JDK 1.6, even with Jet, also in a variety of old apps that did not do this on older JVMs. They run slower and slower, speeding up for short periods of time. Restarting them brings them up to full speed. This is the expected behaviour if the app were packratting. see http://mindprod.com/jgloss/packratting.html GC gets more and more frequent, and recovers less and less RAM as it proceeds. I am suspicious the JVM itself is packratting, not the app. I have not run any sort of memory profiler. Has anyone seen this or experimented to figure out what is going on?  SignatureRoedy Green Canadian Mind Products The Java Glossary http://mindprod.com > I have seen a pattern with JDK 1.6, even with Jet, also in a variety > of old apps that did not do this on older JVMs. [quoted text clipped - 8 lines] > > Has anyone seen this or experimented to figure out what is going on? I've got some apps that are running for weeks at a time and after I fixed all the places where I didn't dispose of my JDialogs it was fine. Most of those are currently running on 1.6.0_00 under XP. SignatureKnute Johnson email s/nospam/knute/ I think you can run a memory profiler to get more detail of this case. >I think you can run a memory profiler to get more detail of this case. I was hoping others would know the answer and save me that work. It might not even be an internal memory problem. SignatureRoedy Green Canadian Mind Products The Java Glossary http://mindprod.com On Mon, 27 Aug 2007 01:34:59 GMT, Roedy Green <see_website@mindprod.com.invalid> wrote, quoted or indirectly quoted someone who said : >I have seen a pattern with JDK 1.6, even with Jet, also in a variety >of old apps that did not do this on older JVMs. one slowdown pattern is not in Java at all but in Flash and Shockwave. My hypothesis is a laptop will slow down to conserve power if you don't hit the keyboard for a long time . I discovered these same apps don't slow down on my desktop machine. SignatureRoedy Green Canadian Mind Products The Java Glossary http://mindprod.com Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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