SQL Server specific Performance Monitor (PerfMon) Counters

Processor:
- Process (sqlservr): % Processor Time (desired value: < 80% per core)
- Process (sqlservr): %Privileged Time (desired value: < 30%)

Memory:
- SQL Server:Buffer Manager: Buffer Cache Hit Ratio (desired value: > 90%)
- SQL Server:Buffer Manager: Page Life Expectancy (desired value: > 300 secs)

Disk:
- SQL Server:Latches: Total Latch Wait Time (ms)
- SQL Server:Latches: Latch Waits/sec (desired value: (Total Latch Wait Time) / (Latch Waits/Sec) < 10)