A wrong setup of Config Interval can lead to loss of service caused by too many connections.
In version 7.1 of PST Flight Deck, there’s a new setting for the Migration Agent called Config Interval. This setting controls how often the Migration Agent checks for configuration information.
If this number is set to 0 and the environment is fairly large, this could lead to some sort of “DenialOfService” situation. This is demonstrated by IIS replying with a 503 Service Unavailable error.
This problem can be also identified in IIS logs by multiple occurrences of 503 Service Unavailable errors.
Set the value of Config Interval to a value other than 0.
A recommended value for a production environment is more than 30 minutes.
In large environments (more than 2000 agents installed) minimum recommended “Polling Interval” is 420 minutes.