Candidate Finder selects candidate records from a database for comparison by Transactional Match. Since transactional match compares the suspect record to all of the candidate records returned by Candidate Finder, the performance of Transactional Match is proportional to the number of comparisons.
However, there are things you can do to improve the performance of Candidate Finder. To maximize the performance of Candidate Finder, a database administrator, or developer with extensive knowledge of the database schema and indexes, should tune the SQL SELECT statement in Candidate Finder. One of the most common performance problems is a query that contains a JOIN that requires a full table scan. In this case, consider adding an index or using a UNION instead of a JOIN. As a general rule, SQL queries should be examined and optimized by qualified individuals.