Re: [HACKERS] PostgreSQL not setting OpenSSL session id context?

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От Shay Rojansky
Тема Re: [HACKERS] PostgreSQL not setting OpenSSL session id context?
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Msg-id CADT4RqB2mx4BkJNjLbF3-vcMQiWCrrViJVnRcF4DGVEj0NOZDw@mail.gmail.com
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Ответ на Re: [HACKERS] PostgreSQL not setting OpenSSL session id context?  (Andres Freund <andres@anarazel.de>)
Ответы Re: [HACKERS] PostgreSQL not setting OpenSSL session id context?  (Andreas Karlsson <andreas@proxel.se>)
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On 2017-08-04 07:22:42 +0300, Shay Rojansky wrote:
> I'm still not convinced of the risk/problem of simply setting the session
> id context as I explained above (rather than disabling the optimization),
> but of course either solution resolves my problem.

How would that do anything? Each backend has it's own local
memory. I.e. any cache state that openssl would maintain wouldn't be
useful. If you want to take advantage of features around this you really
need to cache tickets in shared memory...

Guys, there's no data being cached at the backend - RFC5077 is about packaging information into a client-side opaque session ticket that allows skipping a roundtrip on the next connection. As I said, simply setting the session id context (*not* the session id or anything else) makes this feature work, even though a completely new backend process is launched.

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