Re: reducing isolation tests runtime

Hi,

On 2018-12-04 15:45:39 -0500, Tom Lane wrote:
> Andres Freund <andres@anarazel.de> writes:
> > I'd like to see this revived, getting a bit tired waiting longer and
> > longer to see isolationtester complete.  Is it really a problem that we
> > require a certain number of connections? Something on the order of 30-50
> > connections ought not to be a real problem for realistic machines, and
> > if it's a problem for one, they can use a serialized schedule?
> 
> The longstanding convention in the main regression tests is 20 max.
> Is there a reason to be different here?

It's a bit less obvious from the outside how many connections a test
spawn - IOW, it might be easier to maintain the schedule if the cap
isn't as tight.  And I'm doubtful that there's a good reason for the 20
limit these days, so going a bit higher seems reasonable.

Greetings,

Andres Freund