On 2025/03/01 7:52, Melanie Plageman wrote:
On Fri, Feb 28, 2025 at 12:54 AM Bertrand Drouvot
<bertranddrouvot...@gmail.com> wrote:

On Thu, Feb 27, 2025 at 05:55:19PM -0500, Melanie Plageman wrote:
It still needs polishing (e.g. I need to figure out where to put the new guc 
hook
functions and enums and such)

yeah, I wonder if it would make sense to create new dedicated 
"connection_logging"
file(s).

I think for now there isn't enough for a new file. I think these are
probably okay in postmaster.c since this has to do with postmaster
starting new connections.

I'm worried the list of possible connection log messages could get
unwieldy if we add many more.

Thinking out loud, I'm not sure we'd add "many more" but maybe what we could do
is to introduce some predefined groups like:

'basic' (that would be equivalent to 'received, + timings introduced in 0002')
'security' (equivalent to 'authenticated,authorized')

Not saying we need to create this kind of predefined groups now, just an idea
in case we'd add many more: that could "help" the user experience, or are you
more concerned about the code maintenance?

I was more worried about the user having to provide very long lists.
But groupings could be a sensible solution in the future.

Just did a quick test, (did not look closely at the code), and it looks like
that:

'all': does not report the "received" (but does report authenticated and 
authorized)
'received': does not work?
'authenticated': works
'authorized': works

Thanks for testing! Ouch, there were many bugs in that prototype. My
enums were broken and a few other things.

I found some bugs in 0002 as well.  Attached v8 fixes the issues I found so far.

We have to be really careful about when log_connections is actually
set before we use it -- I fixed some issues with that.

When log_connection is empty string in postgresql.conf and I ran
"psql -d "options=-clog_connections=all"", I got the following log message.
You can see the total duration in this message is unexpected.
It looks like this happens because creation_time wasn’t collected,
as log_connections was empty before the fork.

    LOG:  connection establishment times (ms): total: 1148052469, fork: 0, 
authentication: 0

Regards,

--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION



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