Limitations of SQL Server Express - Stack Overflow
stackoverflow.com › questions › 1169634Mar 04, 2016 · Another limitation to consider is that SQL Server Express editions go into an idle mode after a period of disuse. Understanding SQL Express behavior: Idle time resource usage, AUTO_CLOSE and User Instances: When SQL Express is idle it aggressively trims back the working memory set by writing the cached data back to disk and releasing the memory.