Re: subscriptionCheck failures on nightjar

On Mon, Aug 26, 2019 at 11:01:20AM -0400, Tom Lane wrote:
>Tomas Vondra <tomas.vondra@2ndquadrant.com> writes:
>> I'm willing to take a stab at it, but to do that I need a way to
>> reproduce it. Tom, you mentioned you've managed to reproduce it in a
>> qemu instance, but that it took some fiddling with qemu parmeters or
>> something. Can you share what exactly was necessary?
>
>I don't recall exactly what I did anymore, and it was pretty fiddly
>anyway.  Upthread I suggested
>
>>> Now that we know where the problem is, you could probably make it highly
>>> reproducible by inserting a sleep of a few msec between the rename and the
>>> second fsync.
>
>so why not try that first?
>

Ah, right. I'll give that a try.

regards

-- 
Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services