How can I prevent buffering?
There are a few cases where you might want to load all available data at once into the page and benefit from the rendering performance of the grid. You can do so by setting the bufferSize property of the GridView to the number of available rows in your data backend (or to a higher value). Buffering will never happen then. However, be aware of memory consumption due to the fact that the browser needs to manage a large set of data at once.
//Assume you want to represent the data of a table with 5000 rows
var view = new Ext.ux.grid.livegrid.GridView({
...
bufferSize : 5000,
...
});