When the grids have large number of rows, it is not efficient to load the complete set of data into memory.
Peppermint has 3 different ways of loading the grid data
1) Full Load (all data is read into memory)
2) Paginated (data is read page by page)
3) Progressive Load (chunks of data are loaded, anticipating the actions of the user) This is the preferred method.
The setting is store by user, so changing the setting for a user, while change the way all the grids will work, for that user.
To change the grid load setting : click on the My Profile icon (top right) 
Then choose "My profile"
And finally, in the Grod Preferences, select from the drop down menu, the option Progressive Load (or try the others, if you wish).
The do not forget to click on Save !
