MACROMEDIA COLDFUSION 4.5-ADMINISTRING COLDFUSION SERVER Manual page 228

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The load monitor shows three lines:
Top line (red): Peak Load Threshold
Middle line (yellow): Gradual Redirection Threshold
Bottom line (green): ColdFusion Server Load
Adjusting load threshold settings graphically
You can view and set threshold settings relative to one another using the Server Load
dialog's visual display. To set or change threshold settings using this method, you use
your mouse to drag the Peak and Gradual Redirection threshold lines to their desired
settings instead of entering numeric values in fields, as you do in the server Properties
dialog box.
To configure load threshold settings using the Server Load dialog box:
1. Select one of the servers in your cluster and choose Load from the Monitor menu.
Alternatively, you can right mouse click the server you've selected and select
Monitor>Load.
The Server Load dialog box appears.
Administering ColdFusion Server