Performance Troubleshooting
Performance troubleshooting combines SQL Server evidence with workload and infrastructure context to determine why a system is slow or unstable. The focus is on structured diagnosis rather than isolated tuning changes.
SQL Server Query Store: Why Performance History Matters
A SQL Server performance problem is not always still there when someone finally has time to investigate it. SQL Server Query Store becomes especially useful when the system has already returned to normal. Users may report that an application was slow around 10:00. An hour later, response times are back ...
High SQL Server CPU Is a Signal, Not a Root Cause
High CPU usage is easy to see, but the percentage alone does not explain the cause. A useful diagnosis connects workload, execution plans, SQL Server signals and infrastructure data before changes are made.
SQL Server Wait Statistics Are Not a Diagnosis
SQL Server wait statistics are often one of the first things people check when performance drops, and for good reason. They show where SQL Server is spending time and can provide a useful direction at the start of an investigation. The problem begins when the highest wait type becomes the ...