Re: [PATCH] random_normal function

On 1/9/23 23:52, Tom Lane wrote:
> BTW, if this does bring the probability of failure down to the
> one-in-a-billion range, I think we could also nuke the whole
> "ignore:" business, simplifying pg_regress and allowing the
> random test to be run in parallel with others.
With 'ignore' option we get used to cover by tests some of the time 
dependent features, such as "statement_timeout", 
"idle_in_transaction_session_timeout", usage of user timeouts in 
extensions and so on.

We have used the pg_sleep() function to interrupt a query at certain 
execution phase. But on some platforms, especially in containers, the 
query can vary execution time in so widely that the pg_sleep() timeout, 
required to get rid of dependency on a query execution time, has become 
unacceptable. So, the "ignore" option was the best choice.

For Now, Do we only have the "isolation tests" option to create stable 
execution time-dependent tests now? Or I'm not aware about some test 
machinery?

-- 
Regards
Andrey Lepikhov
Postgres Professional