> > Can you please provide dome JIRAs for superior fixes and performance > improvements which are present in 3.11.1 but are missing in 3.0.15. >
Some that come to mind… Cassandra Storage Engine: CASSANDRA-12269, CASSANDRA-12731 Streaming and Compaction: CASSANDRA-11206, CASSANDRA-9766, CASSANDRA-11623, Reintroduce off heap memtables – CASSANDRA-9472
