Re: [HACKERS] Continuous buildfarm failures on hamster with bin-check

Tom Lane wrote:
> Michael Paquier <michael.paquier@gmail.com> writes:
> > That's the point I am trying to make upthread: slow buildfarm animals
> > should have minimal impact on core code modifications. We could for
> > example have one environment variable that lists all the parameters to
> > modify in a single string and appends them at the end of
> > postgresql.conf. But honestly I don't think that this is necessary if
> > there is only one variable able to define a base directory for
> > temporary statistics as the real bottleneck comes from there at least
> > in the case of hamster.
> 
> FWIW, I'm a bit suspicious of relocating the temp stats directory as
> being a reliable fix for this.  It looks to me like hamster isn't that
> much slower than gaur/pademelon, ie the same machine that was my primary
> development machine for well over a decade, and on which I have NEVER
> seen a "stats collector not responding" failure.  Plus, if hamster's
> main storage is SSD, that seems unlikely to be slower than the spinning
> rust in gaur/pademelon.  So I can't escape the suspicion that something
> else is going on there.  Seemingly-unexplainable stats collector problems
> have been a bugaboo for a long time ...

It's an SD card (the kind typically used in cameras and phones), not SSD.
Saying it's slow is an understatement.  It's *excruciatingly* slow.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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