Carl Stalhood

Wednesday 24 August 2011

Load e-valuator rules

Load throttling ?

This rule determines load based on how user logon operations affect server performance. If logon is an expensive operation, set this to High (default).

Context Switches ?


This rule allows your load evaluator to calculate a load based on the CPU context switches. A context switch occurs every time the operating system switches from one executing process to another.
When the CPU context switches are within the low and high thresholds, Load Manager reports a load percentage based on the threshold values.
When the CPU context switches exceed the high threshold, Load Manager reports full load.
When the CPU context switches are less than the low threshold, Load Manager reports no load.
The valid range for the high and low thresholds is 0 to 2147483647.

Page faults ?

This rule allows your load evaluator to calculate a load based on the number of page faults per second. A page fault occurs every time the operating system accesses physical memory that has been flushed to disk.
When the number of page faults per second is within the low and high thresholds, Load Manager reports a load percentage based on the threshold values.
When the number of page faults per second exceeds the high threshold, Load Manager reports full load.When the number of page faults per second is less than the low threshold, Load Manager reports no load.
The valid range for the high and low thresholds is 0 to 2147483647.

Scheduling ?

This rule schedules the availability of selected servers or published applications. This rule sets the weekly days and hours during which the server or published application is available to users and can be load managed. For example, you can use this rule to prevent access to sensitive data outside of regular business hours.
For each day of the week, you can specify a list of time intervals, during which Load Manager will report no load. During the other times of the day, Load Manager will report full load.
To view the list of time intervals for a day of the week, select the day from the Day of Week list. The list of time intervals appears under Times of Day. To add an interval to the list, click Add Interval. To remove an interval, select it and then click Remove Interval.
This rule should be used in conjunction with another rule because it will not balance connection load if used by itself.