You can turn off parallel processing for a single query. This can be beneficial because the query then uses fewer system resources if you use non-parallel processing.
In the case of queries with very fast response times, the effort required for parallel processing can be greater than the potential time gain. In this case, it may also make sense to turn off parallel processing.
For more information about parallel processing, see Processing Queries.
If you choose the option Do Not Use Parallel Processing, the selected query is processed sequentially in the future.