List view group option.

Question

Hi,

I am trying hardly to group my list of document management based on dates but it's returning only one day per page. I did the same configuration on SharePoint Services 3.0 and it's working perfectly on tha server. Same is not working on SharePoint Server 2010.

You can refer to the attached file to understand what i'm trying to solve. My list is over 90000 (on 3 years) entries and the performance of my server might go down if i dont solve this issue. Hope somebody can help me to solve this issue. Thank you in advance.