I want to be free

After authentication in my project it takes about 10-20 minutes for the auth session to expire, which is not handy — you go to get a snack and see a login screen coming back.

This is how to make the TTL of your auth session longer:

$s = new Zend_Session_Namespace(
    $this->_auth->getStorage()->getNamespace() );

$s->setExpirationSeconds( strtotime('30 day', 0) );

Now your users will log in for 30 days.

You can call this code in your login action after successful authentication and before the redirect to the landing page.