Re: Postgresql 9.0.2 explain analyze very slow (10x), compared to actual query time

On Wed, 12 Jan 2011 10:45:20 -0600, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> The short of it is that cheap motherboards tend to provide cheap clock
> hardware that takes about a microsecond to read.

I'm not sure how gettimeofday() works, but is there a slight chance this
could be alleviated by choosing a different kern.timecounter.hardware
option?

kern.timecounter.choice: TSC(800) HPET(900) ACPI-fast(1000) i8254(0)
dummy(-1000000)
kern.timecounter.hardware: ACPI-fast

Or does the kernel timer stuff have nothing to do with gettimeofday()?


Regards,


Mark