Re: [w32] test_shm_mq test suite permanently burns connections slots

On Fri, Jul 25, 2014 at 3:25 PM, Noah Misch <noah(at)leadboat(dot)com> wrote:
> On a Windows or other EXEC_BACKEND build, the following eventually gets
> failures because all, or all but one, max_connections slot is consumed:
>
> for run in `seq 1 100`; do make -C contrib/test_shm_mq installcheck; done
>
> When I use max_connections=40, it fails on the sixth iteration. Only the six
> basic processes are actually running at that time.

The tests start 7 workers each time, so that makes sense: 7 * 5 < 40
but 7 * 6 > 40. What I'm not sure is why they are leaking connection
slots, and why they're only doing it in EXEC_BACKEND mode. A quick
code audit didn't uncover any obvious explanation, so I'll try to
reproduce and debug.

--
Robert Haas
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