some_function() {
    $this->load->model('users_model');
    $data = $this->users_model->some_function();
    $this->load->view('page', $data');
}

$this->output->enable_profiler(TRUE);

$this->db->select('auth_meta.user_id, auth_meta.first_name, auth_meta.last_name, auth_users.email, auth_users.notifications, auth_users.password');
        $this->db->from('project_users');
        $this->db->join('auth_users', 'project_users.user_id = auth_users.id');
        $this->db->join('auth_meta', 'project_users.user_id = auth_meta.user_id');
        $this->db->where("project_users.role_id = $role_id");

        return $this->db->get()->result();

$this->load->library('cache');
//멤케쉬 로드 하기
$this->cache->useMemcache($iptomemcache, $port); /* 멤케쉬 연결하기 */
$this->cache->save('testkey', 'testdata', NULL, 3600); /* "testdata"를 1시간 저장하기. */
echo $this->cache->get('testkey');

//이렇게 해야 "testdata"를 사용할수 있습니다

$this->cache->useFile();
//etc.