Re: Why is parula failing?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: David Rowley <dgrowleyml(at)gmail(dot)com>
Cc: "Tharakan, Robins" <tharar(at)amazon(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Why is parula failing?
Date: 2024-04-02 00:11:33
Message-ID: 1395918.1712016693@sss.pgh.pa.us
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David Rowley <dgrowleyml(at)gmail(dot)com> writes:
> On Sat, 30 Mar 2024 at 09:17, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> ... in connection with which, I can't help noticing that parula
>> is using a very old compiler:
>> configure: using compiler=gcc (GCC) 7.3.1 20180712 (Red Hat 7.3.1-17)
>> I wonder why parula is using that when its underlying system seems
>> markedly newer (the kernel at least has a recent build date).

> It could be, but wouldn't the bug have to relate to the locking code
> and be caused by some other backend stomping on the memory?
> Otherwise, shouldn't it be failing consistently every run rather than
> sporadically?

Your guess is as good as mine ... but we still haven't seen this
class of failure on any other animal, so the idea that it's strictly
a chance timing issue is getting weaker all the time.

regards, tom lane

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