Xpost: Httpd LimitRequestFields variable in NGINX??

Hi experts,

I have been asked to update some file size limits for NGINX, however I was only given the httpd/apache setting variables.

Please let me know what the equivalent variable is for NGINX.

LimitRequestFields 300
LimitRequestFieldsSize 10485760
LimitRequestLine 10485760

I am running a php script that is loading cvs data into a MySQL database.
And received a 504 Gateway Time-out alert.

Thank you in advance
Craig.