On Fri, Mar 29, 2019 at 01:09:46PM +1300, Thomas Munro wrote:
>
> ...
>
>I still don't know why exactly this happens, but it's clearly a real
>phenomenon. As for why Tomas Vondra couldn't see it, I'm guessing
>that stacks more RAM and ~500k IOPS help a lot (essentially the
>opposite end of the memory, CPU, IO spectrum from this little
>machine), and Joyent's systems may be somewhere in between?
>
If needed, I guess I can rerun the tests with data on the SATA RAID, but
this time limit the amount of RAM to something much lower.
regards
--
Tomas Vondra http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services