At 1.6 million photos, I assume you have a decent ISP (or self hosted...)
If you can get the page to load with debug on (for admin only is fine) - the SQL query trace could show us where time is being spent...
If not, your ISP should be able to see if ...
If you can get the page to load with debug on (for admin only is fine) - the SQL query trace could show us where time is being spent...
If not, your ISP should be able to see if ...