How does DB2 handle cursor positioning when dealing with large result sets?

DB2 employs prefetching techniques to optimize cursor positioning when dealing with large result sets. Prefetching involves retrieving multiple rows from the database in advance and storing them in memory. This approach reduces the number of disk I/O operations and minimizes the latency associated with fetching data. By prefetching rows, DB2 ensures that the cursor can quickly access the next set of rows, enhancing the overall performance of data retrieval operations.