Java中是否存在GC，可能会同时运行100％而不引入延迟（停止运行）？ [英] Is there a GC in Java that does not introduce latency (stop-the-world) by perhaps running 100% concurrently?

问题描述

只是好奇。我听说了有关新G1GC寻址延迟问题的一些信息。我不能/不想使用RTSJ。

预先致谢

解决方案

我不认为有任何零垃圾收集器。但一般来说，一个像CMS这样的低收入收集者将会完成这项工作。

暂停和暂停减少的问题如下：

• 一个零暂停（或几乎零暂停）收集机制显着增加了正常程序执行的开销。使用多线程语言（如Java）尤其如此。
  

• 如果应用程序产生过多垃圾，则使用专用线程进行垃圾回收的方案可能会淹没。
  

• 如果应用程序的内存使用模式过于笨拙和/或您没有足够的物理和虚拟记忆。

Just curious. I heard something about the new G1GC addressing that latency problem. I can't / don't want to use RTSJ.

Thanks in advance

解决方案

I don't think there are any zero-pause garbage collectors. But generally speaking a low-pause collector like CMS will do the job.

The problems with pauses and pause reduction are as follows:

• A zero-pause (or almost zero-pause) collection regime significantly increases overheads for normal program execution. This is particularly true with multithreaded languages like Java.

• Schemes that use a dedicated thread or threads to do garbage collection can get swamped if the application generates too much garbage.

• Any GC scheme will give you poor performance if the application's memory usage patterns are too "lumpy" and/or you don't have enough physical and virtual memory.

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