Session cache management is becoming a performance and scalability bottleneck. For TLS 1.3, it is possible to support session resumption without server-side state. We should consider this enhancement for TLS 1.3 implementations.
JDK-8211018Session Resumption without Server-Side State
JDK-8202086Improve performance characteristics of sun.security.util.MemoryCache
JDK-8210985Update the default SSL session cache size to 20480