On Tue, Feb 3, 2026 at 11:33 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Apparently, because its file system sucks. One thing we do over and
> over in the TAP tests is to copy an initialized data directory to
> prepare a new instance, basically "cp -RPp template-dir $PGDATA".
> I'm observing that taking about 22 seconds on the AIX machine
> (which is actually slower than running initdb would be: about 15s),
> compared to 2.6s on the G4, and about 0.035s on my Linux workstation
> (which can do the same overall -j2 check-world in five minutes).
>
> To be clear, there is as far as I can tell next to zero background
> I/O load on cfarm119. This is a typical readout when I'm not
> running anything:
I'd kinda want to see some evidence that this affects all machines
rather than just this one. I mean, AIX may not be the most modern
thing out there, so maybe it's not great at disk I/O, but these tests
don't tell us whether it's the OS that sucks or the hardware.
--
Robert Haas
EDB: http://www.enterprisedb.com
