
Was That Query Always This Slow? The Query-History Gap in MySQL, SQL Server, and DB2
Your database can tell you which queries are slow right now. It usually can't tell you which ones got slower, because the per-query numbers it keeps are a running total with no time axis: reset on restart, or evicted as a cache fills. Here's the query-history gap in MySQL, Microsoft SQL Server, and DB2, why SQL Server is the exception that proves the point, and why the trend belongs in the Oracle Enterprise Manager repository, including the unglamorous work of making the subtraction honest.
Aug 24, 2026





















