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 .
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.