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With the trace flag on, if you set up jobs to concurrently update statistics on the same table, they won’t block each other on metadata related to statistics updates.
Jonathan Kehayias has a great post on TF 7471 on SQL
Prior to 2016, here’s a quick rundown of pros and cons of TF2371: Overall, this is a low risk trace flag.
For SQL Server 2005 – SQL Server 2014 (with no trace flags) to make an optimization decision that the update is kicked off. Trace Flag 2371 makes the formula for large tables more dynamic.Statistics take up a negligible amount of space compared to indexes.With default database settings, the SQL Server optimizer looks at how many changes have occurred for a given column statistic as part of query optimization.Trace Flag 7471 is a global trace flag released in SQL Server 2014 SP1 Cumulative Update 6.This trace flag changes the locking behavior associated with updating statistics.