Upon upgrading to 8u261 from 8u251, experienced higher cpu and increased GCs when running the same load test. Increasing heap reduced their GCs, but CPU utilization was still higher and slower response times were observed.
JDK-8210985Update the default SSL session cache size to 20480
JDK-8255603Memory/Performance regression after JDK-8210985
JDK-8259886Improve SSL session cache performance and scalability