| From: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, Andres Freund <andres(at)anarazel(dot)de>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: subscriptionCheck failures on nightjar |
| Date: | 2019-08-26 20:23:25 |
| Message-ID: | 20190826202325.soqe6gmgnenbmzee@development |
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| Lists: | pgsql-hackers |
On Mon, Aug 26, 2019 at 11:01:20AM -0400, Tom Lane wrote:
>Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)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
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