Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?

On 03.02.2026 18:44, Andres Freund wrote:
> Yea, I doubt this is the right path... Particularly because I really think we
> ought to eventually use this not just on linux but other OSs as well.

+1

>> BTW, -1 to fast_clock_source, +1 to clock_source or maybe
>> explain_clock_source(?)
> 
> Hm. I think it'd make sense to use eventually use this clock source for other
> timing tasks too, not just explain.  E.g. pg_stat_statements could benefit
> quite a bit from reducing the timing overhead.
> 
> Whereas it'll not make sense for anything that needs wall clock times - which
> imo makes a "clock_source" GUC misnamed.  Maybe "clock_source_timing" or such?

Makes sense. clock_source_timing works for me, or maybe easier to read
would be timing_clock_source. But doesn't matter much.

--
David Geier