In SQL Server 2017, automatic plan correction was added, which allows for the database engine to automatically use the "last known good plan" for a query that has suddenly regressed in performance.

Storing SQL execution plans in RAM: By pre-parsing and pre-computing the execution plans for the SQL, the database vendors bypass the overhead of parsing and invoking the SQL optimizer to generate ...

In many ways, Hadoop is the most concrete technology underlying today’s big data revolution, but it certainly does not satisfy those who want quick answers from their big data. Hadoop – at least ...