Alvaro Herrera <alvherre@commandprompt.com> writes:
> Magnus Hagander wrote:
>> I've noticed that if for example the autovacuum process dies (such as
>> with a kill -9 when testing my new shared mem implementation), only
>> autovac and bgwriter are restarted. The stats collector is terminated,
>> but not restarted. (Same goes for a regular backend, and not just
>> autovac)
>>
>> Is there a reason for this, or is it a bug?
> I would say it is a bug, because the comments and code in ServerLoop()
> and reaper() say different.
There is code in pgstat_start that limits the frequency with which new
stats collectors can be spawned --- maybe your test case is hitting that?
regards, tom lane