Updating g1

G1 defaults have been balanced differently than either of the other collectors.G1's goals in the default configuration are neither maximum throughput nor lowest latency, but to provide relatively small, uniform pauses at high throughput.

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However, there are cases when the default heuristics or default configurations for them provide suboptimal results.This includes the type of collection and a breakdown of time spent in particular phases of the pause.The following subsections explore some common performance issues. The reason that a Full GC occurs is because the application allocates too many objects that can't be reclaimed quickly enough.Potential options in this case are increasing the heap region size by using the option to decrease the number of humongous objects, or increasing size of the heap.In extreme cases, there might not be enough contiguous space available for G1 to allocate the object even if available memory indicates otherwise.

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