Java GC, HotSpot's CMS and heap fragmentation
Concurrent Mark Sweep (CMS) is one of garbage collection algorithms implemented in HotSpot JVM. CMS is designed to be mostly concurrent, requiring just two quick stop-the-world pauses per old space garbage collection cycle. But if CMS cannot keep up with allocation of memory by application, it may fallback to stop-the-world whole heap collection - infamous Full GC pause. Full GC is very noticeable
Understanding GC pauses in JVM, HotSpot's CMS collector.
Understanding GC pauses in JVM, HotSpot's CMS collector. Concurrent Mark Sweep (CMS) is one of HotSpot JVM low pause garbage collectors. CMS can do most of its work for reclaiming memory concurrently with application (without stopping it). But still it requires few stop-the-world pauses to make its work. This article will explain nature of these pauses and how to minimize them. HotSpot’s CMS is a
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