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From: Tomas Vondra <[email protected]>
To: Tom Lane <[email protected]>
Cc: Michael Paquier <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: subscriptionCheck failures on nightjar
Date: Mon, 26 Aug 2019 22:23:25 +0200
Message-ID: <20190826202325.soqe6gmgnenbmzee@development> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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On Mon, Aug 26, 2019 at 11:01:20AM -0400, Tom Lane wrote:
>Tomas Vondra <[email protected]> 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 

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