Warn "a client request body is buffered to a temporary file"

[highfly22]

When a route with gprc proxy is used, stdout keeps printing the warn message "a client request body is buffered to a temporary file" .

I have changed ngx_tpl.lua to set up client_body_buffer_size to 20M. But it doesn't work.

[tokers]

You should modify the directive client_body_buffer_size.

[highfly22]

I tried. But it doesn't work.

[tokers]

How large is your client's body?