Re: Unnecessary connection overhead due copy-on-write (mainly openssl)

Jacob Champion <jacob.champion@enterprisedb.com>

From: Jacob Champion <jacob.champion@enterprisedb.com>
To: Peter Eisentraut <peter@eisentraut.org>
Cc: Andres Freund <andres@anarazel.de>, pgsql-hackers@postgresql.org
Date: 2025-06-06T15:41:20Z
Lists: pgsql-hackers
On Fri, Jun 6, 2025 at 4:56 AM Peter Eisentraut <peter@eisentraut.org> wrote:
> It seems weird to me that openssl spends so much effort tidying up its
> memory allocations just before exiting.  We could just skip that.
> Looking through the code of OPENSSL_cleanup(), there might be one or two
> cases of log or trace files that get flushed during cleanup, so it's not
> an absolute no-brainer to skip all the cleanup.

I guess I'd be concerned that a hardware crypto provider might need
good-faith cleanup to work well. I understand they can't rely on
atexit in general, but there would be a big difference between "you
might have to clean up after a crash" and "every single connection
litters the hardware with unused stuff".

But that's pure FUD and guesswork; I have no examples to point to, so
there might not be any providers that need that.

--Jacob