Hierarchical grid not operational when large amount of data is loaded

[kshipra]

I have hierarchical grid, which freezes when 6000 rows are loaded with 15 columns on parent and detail grid.
I reduced data sent to grid and then it started working properly. I have virtualX and virtualY  enabled.
I am using grid 5.6.1

[paramvir]

virtualX and virtualY are not relevant to v5

Please use fixed height of grid ( non flex )  so that grid can use virtual rendering to save memory.