Andres Freund <and...@anarazel.de> writes: > On 2016-12-27 01:35:05 +0000, Greg Stark wrote: >> On Dec 26, 2016 10:35 PM, "Tom Lane" <t...@sss.pgh.pa.us> wrote: >>> So it seems like the configure support we'd need is to detect >>> whether clock_gettime is available (note on Linux there's also >>> a library requirement, -lrt), and we would also need a way to >>> provide a platform-specific choice of clockid; we at least need >>> enough smarts to use CLOCK_MONOTONIC_RAW on macOS.
>> This seems like something that really should be checked at runtime. > I'm pretty strongly against doing performance measurements at > startup. Both the delay and the potential for differing test results > seem like pretty bad consequences. Yeah, that doesn't sound great to me either. And I don't entirely see the point, at least not with what we know now. I am a bit concerned that we'll find out there are popular platforms where clock_gettime compiles but fails with ENOSYS, or some similarly unhelpful behavior. But we won't find that out if we don't try. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers