Re: Add an optional timeout clause to isolationtester step.

On Sat, Mar 07, 2020 at 04:09:31PM -0500, Tom Lane wrote:
> Julien Rouhaud <rjuju123@gmail.com> writes:
> > On Sat, Mar 07, 2020 at 10:46:34AM -0500, Tom Lane wrote:
> >> What's the actual need that you're trying to deal with?
>
> > Testing the correct behavior of non trivial commands, such as CIC/reindex
> > concurrently, that fails during the execution.
>
> Hmm ... don't see how a timeout helps with that?

For reindex concurrently, a SELECT FOR UPDATE on a different connection can
ensure that the reindex will be stuck at some point, so canceling the command
after a long enough timeout reproduces the original faulty behavior.