Citrix Systems Citrix MetaFrame Application for Windows 1.8 - Manual (Page 118)

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u Pagefile Usage. The ratio of the current pagefile size to the allowed minimum
free space left in the pagefile.
u Swap Activity. The number of times per second the pagefile is accessed.
u Processor Usage. The percent of time the processor is busy.
u Memory Load. The ratio of available memory to total physical memory.
u Sessions. The ratio of total configured ICA connections to free ICA
connections.
u Overall Adjustment. Raises or lowers the overall calculated load of a server.
By default, this is set at no adjustment.
Sessions that use RDP are not counted for the User Load or Sessions
calculations. If you mix Citrix ICA and RDP connections, configure your servers
to use advanced factors such as Processor Usage and Memory Load to calculate
load level.
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You can adjust the importance of each factor. The importance of a factor
determines how much its load influences the overall system load calculation
relative to the other factors. For example, if User Load is set at Very Important
and all other factors are set at Not Important, the User Load calculation is the
only factor used to determine overall system load.
Each of the importance settings is independent of the other settings. Raising the
importance of one factor does not influence how important any other factor is in
the overall calculation. For example, if each factor is set at very important, all
factors are given the same weight.
If you want to temporarily prevent a particular Citrix server from being
selected to run any load balanced applications, set all importance sliders for that
server to Not Important.
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Two of the factors, User Load and Pagefile Usage, have additional parameters
you can adjust.
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User Load is the ratio of the current number of users to the smaller of:
u The total number of local plus pooled user counts on the network.
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