Hi Harish,
Maker update usage is depend on the data source and update method.
INIT Load
2LIS_03_BX with Marker Update (No selection)
2LIS_03_BF with No Marker Update (selection)
2LIS_03_UM with No Marker Update (selection)
Full load
2LIS_03_UM with No Marker Update (selection)
2LIS_03_BF with No Marker Update (selection)
Delta
2LIS_03_UM with Marker Update (No selection)
2LIS_03_BF with Marker Update (No selection)
Please go thru below link might be useful.
Thanks