client_body_in_file_only

Determines whether nginx should save the entire client request body into a file. This directive can be used during debugging, or when using the $request_body_file variable, or the $r->request_body_file method of the module ngx_http_perl_module.

When set to the value on, temporary files are not removed after request processing.

The value clean will cause the temporary files left after request processing to be removed.