#disk #windows #performance #monitor #perfmon #process When a **#WindowsServer** server is performing poorly, you can use the **Performance Monitor** to monitor the disks. Start **`perfmon`**. Select **`Physical Disk`** → **`Average Queue Length`**. This is similar to observing the disk activity lights. Under normal usage, this value should be around **3 to 4**. If it is significantly higher, that indicates a problem. Under **`Process`**, you can select **`IO Data Bytes/sec`** per process to check how much disk activity a process requires. Zie ook [[Performance of Exchange Server]] Zie ook [[Improve Windows Performance]] Zie ook [[Performance Tools]]