code: private void setBufferSizes(HttpConfiguration buffers) {
          if (requestHeaderSize > 0) {
              LOGGER.info("Request header size set to {} for {}", requestHeaderSize, buffers.getClass().getCanonicalName());
              buffers.setRequestHeaderSize(requestHeaderSize);
          }
  
          if (responseBufferSize > 0) {
              LOGGER.info("Response buffer size set to {} for {}", responseBufferSize, buffers.getClass().getCanonicalName());
              buffers.setOutputBufferSize(responseBufferSize);
          }
          if (responseHeaderSize > 0) {
              LOGGER.info("Response header size set to {} for {}", responseHeaderSize, buffers.getClass().getCanonicalName());
              buffers.setResponseHeaderSize(responseHeaderSize);
          }
      }
docs: Sets the request and header buffer sizex if they are not zero