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Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
The Errors and Warnings event category contains general error and warning events.
In This Section
| Topic | Description |
|---|---|
| Attention Event Class | Indicates that an Attention event has occurred. |
| Background Job Error Event Class | Indicates that a background job has terminated abnormally. |
| Bitmap Warning Event Class | Indicates that bitmap filtering has been disabled in a query. |
| Blocked Process Report Event Class | Indicates that a task has been blocked for more than a specified amount of time. |
| CPU Threshold Exceeded Event Class | Indicates that the Resource Governor detects a query that exceeds the specified CPU threshold. |
| ErrorLog Event Class | Indicates that error events have been logged in the SQL Server error log. |
| EventLog Event Class | Indicates that events have been logged in the Windows event log. |
| Exception Event Class | Indicates that an exception has occurred in SQL Server. |
| Exchange Spill Event Class | Indicates that communication buffers in a parallel query plan have been written to the tempdb database. |
| Execution Warnings Event Class | Indicates that memory grant warnings occurred during the execution of a SQL Server statement or stored procedure. |
| Hash Warning Event Class | Indicates that a hash recursion or hash bailout has occurred during a hashing operation. |
| Missing Column Statistics Event Class | Indicates that column statistics that could have been useful for the optimizer are not available. |
| Missing Join Predicate Event Class | Indicates that a query is being executed that has no join predicate. |
| Sort Warnings Event Class | Indicates that sort operations do not fit into memory. |
| User Error Message Event Class | Displays error messages that are seen by the user. |