What is the Parallel Young Generation collector (-XX:+UseParNewGC)?
The parallel young generation collector is similar to the parallel garbage collector (-XX:+UseParallelGC) in intent and differs in implementation. Most of the above description for the parallel garbage collector (-XX:+UseParallelGC) therefore applies equally for the parallel young generation collector. Unlike the parallel garbage collector (-XX:+UseParallelGC) this parallel young generation collector can be used with the concurrent low pause collector that collects the tenured generation.