while ((instance= memcached_io_get_readable_server(memc)))
{
memcached_return_t response_rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
while ((instance= memcached_io_get_readable_server(memc)))
{
memcached_return_t response_rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);