Re: regression, deadlock in high frequency single-row UPDATE

On Fri, Dec 12, 2014 at 12:52 PM, Alvaro Herrera
<alvherre@2ndquadrant.com> wrote:
> Okay, I created a reproducer ... but it doesn't work.  I mean, the
> commands are fine: if I execute them manually in four sessions in an
> unpatched server I get a deadlock.  But isolationtester doesn't know to
> handle more than one blocked session, so it just hangs when the third
> session blocks after the second one is already blocked.  :-(

We need a stress-testing framework. I hacked together one for the ON
CONFLICT UPDATE patch (https://github.com/petergeoghegan/upsert), but
a more comprehensive effort is needed.

--
Peter Geoghegan