On 2016-02-12 13:16:54 -0500, Tom Lane wrote:
> Investigation showed that there are a couple of reasons. One,
> isolationtester's is-it-waiting query takes an insane amount of
> time under CLOBBER_CACHE_ALWAYS --- over half a second on my
> reasonably new server.
I wonder if we shouldn't just expose a 'which pid is process X waiting
for' API, implemented serverside. That's generally really useful, and
looks like it's actually going to be less complicated than that
query... And it's surely going to be faster.
Andres