Reporting : GMS Reporting Overview

Sorting Report Data
Report data is sorted and ranked according to how many rows are displayed. By specifying a limited number of rows to be displayed in the graph section of the Report, rankings apply only to the data in those rows. If you reverse the sort order by clicking on the column bar, only the displayed items are re-sorted.
To re-sort according to all collected data in the database, click Enable Server Side Sort on the pull-down menu. The ranking of the grid items then reflects all data from the total entries.
By default, Client-side Sort is used that sorts only the currently viewable data that was retrieved the first time the data base was clicked on.
For example, the snapshot that follows shows data displayed only as it pertains to ten rows.
If you re-rank the column to see the lowest number of hits, it ranks only the items displayed in the ten rows you selected.
Use Enable Server Side Sort to sort data based on all underlying data records, not the client-side sort. Server side Sort retrieves current data from the back end database. Client-side sort merely rearranges the data already retrieved. You can still constrain your display to 10 rows, but the display will re-sort based on the total data collected in the back-end database, and not just the data previously displayed.