Set System Resource Usage Level
Indexing is a resource-intensive feature that requires considerable CPU cycles. Indexing gigabytes of data can take hours or days. Indexing should be scheduled for times when the server is not under high usage.
You can control server performance during indexing by using the System resource usage tab. On this tab you can set server usage levels, regardless of the quantity of data to be indexed or the existing server load.
To set a system resource usage level: