Re: pg_terminate_backend() issues

Tom Lane wrote:
> Bruce Momjian <bruce(at)momjian(dot)us> writes:
> > Tom Lane wrote:
> >> The closest thing I can think of to an automated test is to run repeated
> >> sets of the parallel regression tests, and each time SIGTERM a randomly
> >> chosen backend at a randomly chosen time. Then see if anything "funny"
>
> > Yep, that was my plan, plus running the parallel regression tests you
> > get the possibility of >2 backends.
>
> I was intentionally suggesting only one kill per test cycle. Multiple
> kills will probably create an O(N^2) explosion in the set of possible
> downstream-failure deltas. I doubt you'd really get any improvement
> in testing coverage to justify the much larger amount of hand validation
> needed.
>
> It also strikes me that you could make some simple alterations to the
> regression tests to reduce the set of observable downstream deltas.
> For example, anyplace where a test loads a table with successive INSERTs
> and that table is used by later tests, wrap the INSERT sequence with
> BEGIN/END. Then there is only one possible downstream delta (empty
> table) and not N different possibilities for an N-row table.

I have added pg_terminate_backend() to use SIGTERM and will start
running tests as discussed with Tom. I will post my scripts too.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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