Concurrent execution infrastructure configuration behavior

Concurrent execution infrastructure can be configured in the following ways:

Behavior When Configured On: Multiple searches can be carried out at the same time, and the results of the searches are presented together.
Behavior When Configured Off: Searches can only be performed one at a time and the results are presented separately.
Behavior When Configuration is Changed in a Production Environment: Concurrent execution infrastructure configuration can be changed at any time without impact other than changing the search capability.
Configured During Installation: Concurrent execution infrastructure does not require configuration.
Modifying This Feature: Concurrent execution infrastructure can be modified according to the procedures in the developer documentation.