“Page Shrinks” reports the number of times that deleting index rows caused the index to shrink off a page. Shrinks incur overhead due to locking in the index and the need to update pointers on adjacent pages. Repeated “count” values greater than 0 indicate there may be many pages in the index with fairly small numbers of rows per page due to delete and update operations. If there are a high number of shrinks, consider rebuilding the indexes.
