PDudeP
Thanks for the clarification.
If the control panel is on a different server and only acts as a proxy for uploads, it doesn’t really make sense to me that wp-admin would feel faster just by changing those nginx parameters on the CP.
I have a similar setup (nginx on the control panel server and the websites on separate OpenLiteSpeed servers), and I don’t experience slow wp-admin performance.
Would you mind sharing the full nginx configuration file you’re using?