Maintenance activities for high prefetch performance

Page chains for all pages-locked tables and the leaf levels of indexes develop kinks as data modifications take place on the table. In general, newly created tables have few kinks. Tables where updates, deletes, and inserts that have caused page splits, new page allocations, and page deallocations are likely to have cross-allocation unit page chain kinks. If more than 10 to 20 percent of the original rows in a table have been modified, you should determine if kinked page chains are reducing asynchronous prefetch effectiveness. If you suspect that page chain kinks are reducing asynchronous prefetch performance, you may need to re-create indexes or reload tables to reduce kinks.