Fwiw, yes it could be a cosmic ray.
It could also just be marginally bad ram. Bad ram is notoriously hard
to reliably test for. It can be very sensitive to the exact bit
pattern stored in it, the timing of reads and writes, and other
factors. The whole point of the rowhammer attacks is to push som
On 7/7/21 2:53 AM, Jakub Wartak wrote:
Hi, Asking out of pure technical curiosity about "the rhinoceros" - what kind
of animal is it ? Physical box or VM? How one could get dmidecode(1) / dmesg(1) / mcelog
(1) from what's out there (e.g. does it run ECC or not ?)
Rhinoceros is just a VM on a
lvaro Herrera
> Sent: Tuesday, June 22, 2021 4:21 PM
> To: Thomas Munro
> Cc: pgsql-hackers
> Subject: Re: Cosmic ray hits integerset
>
> On 2021-Jun-22, Thomas Munro wrote:
>
> > Hi,
> >
> > Here's a curious one-off failure in test_integerset:
> >
> 22 июня 2021 г., в 19:21, Alvaro Herrera написал(а):
>
> On 2021-Jun-22, Thomas Munro wrote:
>
>> Hi,
>>
>> Here's a curious one-off failure in test_integerset:
>>
>> +ERROR: iterate returned wrong value; got 519985430528, expected
>> 485625692160
>
> Cosmic rays indeed. The base-2 re
On 2021-Jun-22, Thomas Munro wrote:
> Hi,
>
> Here's a curious one-off failure in test_integerset:
>
> +ERROR: iterate returned wrong value; got 519985430528, expected 485625692160
Cosmic rays indeed. The base-2 representation of the expected value is
11100010001000110001100
a
Hi,
Here's a curious one-off failure in test_integerset:
+ERROR: iterate returned wrong value; got 519985430528, expected 485625692160
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=rhinoceros&dt=2021-04-01%2018:19:47
