You can enable the “Boost SQL Server Priority” option, to allow SQL Server threads to run in the real time priority class. When running at this priority level, SQL Server threads will be executed before all other process threads running in the lower variable priority class. This implies that on single processor machines under heavy load and not dedicated to SQL Server, other processes may not get enough attention. However, if the system is dedicated to SQL Server and disk I/O activity tends to be heavy, then you should enable this option to get substantial performance gains.