$self->session_config(
    COOKIE_PARAMS  => {
        -name    => 'ECOMM_SESSID',
        -expires => '+4h',
        -domain  => '.mysite.com',
    },
    SEND_COOKIE => 1
);
CGI::Session->name('ECOMM_SESSID');

##</code><code>##

session_id = 123456789
$self->session->param('order_id') = 4321

##</code><code>##

cookie: ECOMM_SESSID

##</code><code>##

session_id = 987654321 <= a different id than above
$self->session->param('order_id') = null <= no value

##</code><code>##

cookie: CGISESSID <== ECOMM_SESSID is missing and instead...