How does Symphony OCR impact the performance of the PC/Server it is running on?

Symphony OCR is designed to automatically throttle down it's CPU usage if another application on the computer needs the CPU, so the performance impact of Symphony OCR on the indexer PC is negligible.

Symphony OCR is designed to use as much of the computer's CPU capacity that is available (it will use up to 5 cores in full processing mode, 4 of which are used for the actual OCR operation), so you will see the CPU pegged at 100% utilization while there are documents to process, but this processing will not impact other processes on the computer from running normally.

If you wish to Limit the number of Cores that Symphony OCR utilizes, you can do so in the Advanced Settings of the Processor see:   Processor for more information..