Threshold (Util%)

The second condition is met if Bucket Utilization drops below the Threshold (Util%), which by default is 40%. The switch will compensate for the poor utilization by doubling the Hash Table. 40% is recommended for most applications.

Resizing results in the switch utilizing AFT memory more efficiently. When the switch resizes the Hash Table, all entries are flushed and must be relearned.

Important: Avaya highly recommends that the default of 40% not be changed. The affects of varying the Threshold (Util%) are as follows:

• Increasing Threshold: Gives better memory utilization at the expense of more frequent flushing, flooding, and relearning.
• Decreasing Threshold: Gives less efficient memory utilization but does not flush, flood and relearn as often.