Comments on: How does garbage collection work? http://chaoticjava.com/posts/how-does-garbage-collection-work/ The internet, design patterns, frameworks and Java Fri, 05 Mar 2010 16:13:23 -0700 http://wordpress.org/?v=2.8.4 hourly 1 By: Ahsan Javed http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-75057 Ahsan Javed Wed, 03 Mar 2010 10:15:23 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-75057 Really nice article. However it misses other garbage collection algorithm. Are you planning to write them as well, Looking forward to it. Thanks Ahsan Really nice article. However it misses other garbage collection algorithm. Are you planning to write them as well, Looking forward to it.

Thanks
Ahsan

]]> By: uberVU - social comments http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-70079 uberVU - social comments Thu, 26 Nov 2009 00:37:45 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-70079 <strong>Social comments and analytics for this post...</strong> This post was mentioned on Twitter by r3d: Java Garbage collection http://npm55.tk... Social comments and analytics for this post…

This post was mentioned on Twitter by r3d: Java Garbage collection http://npm55.tk…

]]> By: Aviad http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-65752 Aviad Sat, 10 Oct 2009 19:09:45 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-65752 @Muhammad: Whenever it feels like it. More specifically, it depends on which generation you would be talking about. The objects in eden and the to and from areas are constantly GC'd, as only the living objects are moved around. The older generation is GC'd according to some tuning specifications, but generally it would occur when the memory hits the upper limit of the currently allocated memory space, just before allocating more memory (if it didn't reach the maximum yet) or throwing an OOME. I'm not sure about a periodic run of the GC though. @Muhammad: Whenever it feels like it. More specifically, it depends on which generation you would be talking about. The objects in eden and the to and from areas are constantly GC’d, as only the living objects are moved around. The older generation is GC’d according to some tuning specifications, but generally it would occur when the memory hits the upper limit of the currently allocated memory space, just before allocating more memory (if it didn’t reach the maximum yet) or throwing an OOME. I’m not sure about a periodic run of the GC though.

]]> By: Muhammad Ali http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-65751 Muhammad Ali Sat, 10 Oct 2009 19:02:52 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-65751 I want to know that when jvm calls the gc I want to know that when jvm calls the gc

]]> By: Aviad http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-58753 Aviad Fri, 24 Jul 2009 20:12:40 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-58753 @Peter: You're correct. I just had to draw it somewhere, and thought that outside of the memory scope will show that this is a new object better. But obviously, the object is allocated inside Eden and not copied into it. Also, thanks for the compliment. Glad to have a pleased reader! :) @Peter: You’re correct. I just had to draw it somewhere, and thought that outside of the memory scope will show that this is a new object better. But obviously, the object is allocated inside Eden and not copied into it.

Also, thanks for the compliment. Glad to have a pleased reader! :)

]]> By: Peter B. Kessler http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-58742 Peter B. Kessler Fri, 24 Jul 2009 16:57:08 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-58742 One correction: In your picture of scavenging the Eden into the survivor spaces, you make it look as though the "Just allocated" object exists outside of the Eden, and "will go to Eden". In fact, new objects are allocate *in* the Eden, so we don't have to copy it to the Eden. Nice write-up. And some nice comments and patient replies to them. One correction: In your picture of scavenging the Eden into the survivor spaces, you make it look as though the “Just allocated” object exists outside of the Eden, and “will go to Eden”. In fact, new objects are allocate *in* the Eden, so we don’t have to copy it to the Eden.

Nice write-up. And some nice comments and patient replies to them.

]]> By: Aviad http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-58730 Aviad Fri, 24 Jul 2009 11:26:40 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-58730 @Kelvin: Of course not. You could have memory leaks if you retain objects in a "living" state for longer they are required, or if you use more memory than can be allocated by the JVM. It does, however, prevent a lot of "memory leak" situations found in non-GC languages such as not deleting objects for reasons such as mishandling passed references to objects. If you're trying to avoid memory leaks and GC-related problems in Java, please read the <a href="http://chaoticjava.com/posts/gc-tips-and-memory-leaks/" rel="nofollow">GC Tips and Memory Leaks</a> post. @Kelvin: Of course not. You could have memory leaks if you retain objects in a “living” state for longer they are required, or if you use more memory than can be allocated by the JVM. It does, however, prevent a lot of “memory leak” situations found in non-GC languages such as not deleting objects for reasons such as mishandling passed references to objects. If you’re trying to avoid memory leaks and GC-related problems in Java, please read the GC Tips and Memory Leaks post.

]]> By: Kelvin Njenga http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-58697 Kelvin Njenga Thu, 23 Jul 2009 15:44:07 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-58697 hi, i would like to know whether garbage collection really guarantees that a program will not run out of memory. kind regards. hi,
i would like to know whether garbage collection really guarantees that a program will not run out of memory.
kind regards.

]]> By: Aviad http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-57350 Aviad Tue, 07 Jul 2009 18:51:13 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-57350 @Regalla: Which terms are you speaking of? I made sure as much as I can to use the technical terms (for example, Eden, From, To, etc are technical terms). If there's something you're uncertain about, please ask! @Regalla: Which terms are you speaking of? I made sure as much as I can to use the technical terms (for example, Eden, From, To, etc are technical terms).

If there’s something you’re uncertain about, please ask!

]]> By: Regalla Naresh Reddy http://chaoticjava.com/posts/how-does-garbage-collection-work/comment-page-1/#comment-57292 Regalla Naresh Reddy Tue, 07 Jul 2009 10:59:33 +0000 http://chaoticjava.com/posts/how-does-garbage-collection-work/#comment-57292 This is ok ... But the some where it is complex to understand ....! The terms which you have used are standard or not ....? This is ok … But the some where it is complex to understand ….!

The terms which you have used are standard or not ….?

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