Tomas Vondra <tomas.von...@2ndquadrant.com> writes: > On Sun, Aug 04, 2019 at 03:16:12PM -0400, Tom Lane wrote: >> Isn't the issue here the interaction between log_transaction_sample_rate >> and log_min_duration_statement?
> No, that interaction only affects statement-level sampling. OK, I was confusing the features. > For transaction-level sampling we do the sampling independently of the > statement duration, i.e. we when starting a transaction we determine > whether the whole transaction will be sampled. It has nothing to do with > the proposed log_statement_sample_limit. So, to clarify: our plan is that a given statement will be logged if any of these various partial-logging features says to do so? (And the knock on HEAD's behavior is exactly that it breaks that independence for log_min_duration_statement.) regards, tom lane