In this post I’ll describe things you want to consider to let JVM use own ergonomic configuration, without drastically overriding them, for which you need more advanced tuning and more metrics. Pod sizing for GC The limit numbers of processors and memory impacts how JVM will tune its own performance characteristics. Most importantly it impacts what GC will be used and how many threads it will start to clean up memory, which impacts how frequent and long GC pauses are.