Re: reducing isolation tests runtime

Alvaro Herrera <alvherre@2ndquadrant.com> writes:
> On 2019-Feb-13, Tom Lane wrote:
>> Some of the slower buildfarm critters use MAX_CONNECTIONS to limit
>> the load on their hosts.  As long as the isolation tests honor that,
>> I don't see a real need for a separate serial schedule.

> MAX_CONNECTIONS was the only reason I didn't push this through.  Do you
> (Andres) have any solution to that?

Doesn't the common pg_regress.c infrastructure handle that?
We might need to improve isolation_main.c and/or the isolation
Makefile to make it accessible.

I suppose that in what I'm thinking about, MAX_CONNECTIONS would be
interpreted as "max number of concurrent isolation scripts", which
is not exactly number of connections.  A quick and dirty answer
would be to have isolation_main.c divide the limit by a factor of 4
or so.

            regards, tom lane