Hello, Peter.
After we disabled monitoring request to pg_buffercache and upgraded to 9.6.9 - we don't encounter problem.
20.06.2018, 00:35, "Peter Geoghegan" <pg(at)bowt(dot)ie>:
> On Mon, Apr 16, 2018 at 8:42 AM, Vitaly V. Voronov <wizard_1024(at)tut(dot)by> wrote:
>> We have cat crash at our secondary server.
>> This full stack trace from crash dump:
>
> Did the problem recur?
>
> Sorry for letting this one lapse.
>
> --
> Peter Geoghegan