>> Per previous discussions, here are two functions to send INT and TERM
>> signals to other backends.They permit only INT and TERM, and permits
>> sending only to postgresql backends (as registered in pgstat).
>Why does this depend on pgstat? ISTM it would be better to use the 
>per-backend PGPROC information, which is stored in shared memory. 
>Consider TransactionIdIsInProgress() for an example.

I guess the main reason is that I didn't find how to do it. With that
pointer, I can probably redo it.

The other thought is that you're not going to have much use of this if
you don't have pgstat anyway - how are you going to find out which
backends actually exist?

But I could certainly give it a try to recode it on that code.


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