Re: pgsql: Make archiver process an auxiliary process.

On 2021/06/12 19:36, Thomas Munro wrote:
> On Mon, Mar 15, 2021 at 5:14 PM Fujii Masao <fujii(at)postgresql(dot)org> wrote:
>> Make archiver process an auxiliary process.
>>
>> This commit changes WAL archiver process so that it's treated as
>> an auxiliary process and can use shared memory. This is an infrastructure
>> patch required for upcoming shared-memory based stats collector patch
>> series. These patch series basically need any processes including archiver
>> that can report the statistics to access to shared memory. Since this patch
>> itself is useful to simplify the code and when users monitor the status of
>> archiver, it's committed separately in advance.
>
> I think this needs to handle ProcSignalBarrierPending. Otherwise,
> code that tries to use proc signal barriers (like CF #2962 and #2602)
> might hang forever when an archiver is running.

Thanks for the comment! I will investigate this.

Regards,

--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION