Top 10 most important performance counters for Windows and their recommended values

  • PhysicalDisk/%idle time - should not be less than ~%60

  • PhysicalDisk/Avg. Disk sec/Read should not be higher than ~20ms

  • PhysicalDisk/Avg. Disk sec/Write should not be higher than ~20ms

  • PhysicalDisk/Current disk queue length. should not be higher than 2

  • Memory\Available Mbytes, minimum 10% of memory should be free and available

  • \Memory\Pages/sec should not be higher than 1000

  • Network Interface(*)\Bytes Total/sec

    • Less than 40% of the interface consumed = Healthy

    • 41%-64% of the interface consumed = Monitor or Caution

    • 65-100% of the interface consumed = Critical, performance will be adversely affected

  • Network Interface(*)\Output Queue Length

    • 0 = Healthy

    • 1-2 = Monitor or Caution

    • Greater than 2 = Critical, performance will be adversely affected

  • Hyper-V Hypervisor Logical Processor(_Total)\% Total Run Time

    • Less than 60% consumed = Healthy

    • 60% - 89% consumed = Monitor or Caution

    • 90% - 100% consumed = Critical, performance will be adversely affected

  • Paging File\%Usage should not be higher than %10