Hi,
check the below comments which may help you to speed up your fetching process.
At DB level...
1. Do not use
SELECT * FROM
instead use limited and required columns from database.
2. Check indexing in your tables, kindly take a note that sometimes more indexing / wrong indexing may slow your output query when your data in bulk.
3. Fetch limited data in #temp tables from your main tables as per requirements. Do indexing in #temp tables also. Write query on your #temp tables.
4. Make use of
WITH (NOLOCK)
At front End...
5. It seems to be problem at front end level more than database level. Since, fetching 530,000 records from DB is not big issue, displaying at front end is a big issue.
6. There is no point of displaying so many records at front end. How one can search the required data?
7. Check how many filters you can provide @ Front end to display only required data.
8. As you are using Grid View, make use of pagination property.
9. Avoid, if you can, data manipulation at front end.
10. If providing 530,000 records is in requirement, then instead of displaying data give data download.
Hope above will help you.
Cheers.