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The authentication mode where the user passes a SQL Server login name and password, which is checked against a SQL Server system table. The other authentication mode used is Windows authentication. For additional details, see Windows authentication mode .
A statistical function of SQL Server, which measures how widely values deviate from the mean (that is, the average).
Pages “stolen” from the buffer pool to be used for miscellaneous server purposes, when Windows requires memory for another application. A large number of stolen pages may be normal for a short period (for example: if the system backup begins after large database batch run completes). However, constantly high value of this metric may indicate an overall system memory shortage.