Microsoft® SQL Server 2012 Unleashed

query wait

Type: Advanced

Default value: -1

Queries that are memory intensive and involve huge sorts might take a long time to execute, based on the available memory during execution. SQL Server internally calculates the timeout interval for such queries. Usually, this is quite a large number. You can override this value by specifying a value (in seconds) for the query wait parameter in SQL Server. If you set this value too low, you risk more frequent query timeouts when your system is under a heavy load and a highly concurrent environment. If -1 is specified (the default), the timeout is calculated as 25 times of the estimated query cost.

The following is an example of this option:

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exec sp_configure 'query wait', ...