when smartrendering, grid loads two times....

Hi,
im using smartrendering for grid loads.

mygrid.enableSmartRendering(true,20);

but its loads 40 rows in initially display. if using big size monitor grid loads 40 rows.i mean grid loads two times.

if below 17 inch monitor loads 20 rows correctly.

is it CSS problem or what?
kindly help me.

thank you…

In smart rendering mode grid will load enough rows to fill the visible area.
If you have configured that each loading operation must load only 20 rows, it will result in two loading operations, as grid will not stop while all visible area is filled with data.

( also, please beware that for first loading operation limit is set on server side, client side limitation will be applied only for auto-generated data loading calls )