![]() ![]() You can trace the attention event together with the sql_batch_completed and rpc_completed extended events, and correlate them on the same session_id. Use Extended Events or SQL Trace to identify the queries that cause the time-out errors. Making the query run faster is the recommended first target of your troubleshooting. That means that the query runs longer than the pre-defined query time-out value. Troubleshooting stepsīy far, the most common reason for query time-outs is underperforming queries. For more information, see Query time-out is not the same as connection time-out. The latter controls how long to wait for a successful connection and isn't involved in query execution. Query time-out is different from a connection time-out property. In VBA (Excel), it's set through the property.In OLEDB, it's set through the DBPROP_COMMANDTIMEOUT property on the DBPROP structure.In Java Database Connectivity (JDBC) API, it's set through the setQueryTimeout method.In ODBC API, it's set through the SQL_ATTR_QUERY_TIMEOUT attribute in the SQLSetStmtAttr function.NET Framework, the time-out value is set on the CommandTimeout property. If the time-out value on the application side is set to 0 (no time limit), the Database Engine will execute the query until it's completed. On the SQL Server side, a query cancellation from the client side causes an Attention event, error 3617 ( MSSQLSERVER_3617). ![]() The application sets a time-out value and if the time out is reached, it cancels the query. These errors occur on the application side. ![]() The timeout period elapsed prior to completion of the operation or the server is not responding. If the query doesn't return any data within the configured time-out value (typically 30 seconds), the application cancels the query and generates one of these error messages: Assume that an application queries data from a SQL Server database. ![]()
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