Apache Cassandra Benchmarking: 4.0 Brings the Heat with New Garbage Collectors ZGC and Shenandoah Apache Cassandra 4.0 beta is the first version that supports JDK 11 and onwards. Latency is an obvious concern for Apache Cassandra® users and big hopes have been put into ZGC, the new low latency garbage collector introduced in JDK 11. It reached GA in JDK 14, which made us eager to evaluate how good