RFR: JDK-8255603: Memory/Performance regression after JDK-8210985

[Volker Simonis]

On Thu, 29 Oct 2020 16:01:19 GMT, Christoph Langer <clanger at openjdk.org> wrote:

>> Did you have a benchmark with various cache sizes (for example, from 1 to 10K) and various connections (for example from 1 to 10K) for those components (including TLS implementation) that use Cache?
>
>> Did you have a benchmark with various cache sizes (for example, from 1 to 10K) and various connections (for example from 1 to 10K) for those components (including TLS implementation) that use Cache?
> 
> Nope, we've just seen the memory regression in a certain customer use case (lot's of meory retained by a finalizer) and confirmed it resolved after setting javax.net.ssl.sessionCacheSize to 0.
> 
> But I guess this change merits certain further benchmarking to get it right.

Congratulations! You beat me about half an hour with this issue :)

I was debugging this regression already the whole day and when I searched for JDK-8210985 in my mailbox I saw your post.

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PR: https://git.openjdk.java.net/jdk/pull/937