When Throughput Matters – Parallel GC

As I mentioned in one of the previous posts, Parallel Collector is also called Throughput Collector, because its main goal is to maximize overall throughput of the application. The two basic operations that Parallel Collector performs are Minor GC and Full GC. These are pretty straightforward.   Minor GC When Eden fills up, the young…

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User, Sys and Real Times in GC Log

Have you ever wondered what user, sys and real times in a GC log mean? Well, I have, a couple of times at least. Let’s say that we have the following line after Full GC entry: [Times: user=4.21 sys=0.03, real=0.75 secs] To find out what they represent, we should check UNIX command time first. time…

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