On Thu, Mar 09, 2023 at 05:27:08PM -0500, Tom Lane wrote:
> Is it reasonable to assume that all modern platforms can time
> millisecond delays accurately? Ten years ago I'd have suggested
> truncating the delay to a multiple of 10msec and using this logic
> to track the remainder, but maybe now that's unnecessary.
If so, it might also be worth updating or removing this comment in
pgsleep.c:
* NOTE: although the delay is specified in microseconds, the effective
* resolution is only 1/HZ, or 10 milliseconds, on most Unixen. Expect
* the requested delay to be rounded up to the next resolution boundary.
I've had doubts for some time about whether this is still accurate...
--
Nathan Bossart
Amazon Web Services: https://aws.amazon.com
