Dear Chiranjeevi,
You have to be in mind that BEx Analyzer has limitations, it is not a tool for data extraction.
You will be able to extract up to 750 000 data cells. So, if you need more than that, I do recommend you to use OpenHub platform.
So please, refer this note before start your tests:
> 1860872 - Report not executable in BEx Analyzer 7x / Client out of Memory
I hope it helps.
Kind Regards,
Edward John