"Magnus Hagander" <magnus@hagander.net> writes:
>> This seems quite a bizarre way to do things. Why wouldn't you implement
>> this functionality by shipping messages to the stats collector?

> Would you suggest doing the same with the checkpoint counter, that's already in shared mem? I want to expose that number as well..

The shared-mem checkpoint counters serve an entirely different purpose:
they're there to let backends detect when their requested checkpoint has
been completed. They're not intended to count checkpoints over any
long term (remember that sig_atomic_t need only be 8 bits wide).

If you want to track stats about how many checkpoints have been done,
I think that's a job for the stats collector.

regards, tom lane

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