Re: Fix lwlock.c and wait_event_names.txt discrepancy

On Wed, Jul 16, 2025 at 11:41:09AM +0000, Bertrand Drouvot wrote:
> On Wed, Jul 16, 2025 at 01:33:07PM +0200, Álvaro Herrera wrote:
>> I don't.  These names are unlikely to be anywhere other than in the
>> output of queries for any length of time, so if we change them now,
>> nothing will break permanently.  I grant that there might be small
>> temporary breakage if somebody is storing wait event samples or similar,
>> but I doubt it'll be a problem to change it.  Long-term lack of
>> joinability between pg_stat_activity and pg_wait_events in the 17 branch
>> would likely be a bigger problem.
> 
> +1

Thanks.  Perhaps I am worrying to much about the profiles taken on
REL_17_STABLE, but after sleeping on it the long-term picture is
better if we are consistent on all the branches, so done down to v17.
Thanks for the report.

> As a way to prevent this to occur we might want to add extra input file(s)
> parameter to generate-wait_event_types.pl (as proposed in [1]).
> 
> [1]: https://www.postgresql.org/message-id/flat/aDQdDhcwMHjZRhSV%40ip-10-97-1-34.eu-west-3.compute.internal

That's the second issue so far, so we had better do so.
--
Michael