extender timeout session de phpMyAdmin

Edit phpMyAdmin’s config.inc.php and
add or update LoginCookieValidity the value as follows:

$cfg[‘LoginCookieValidity’] = 3600 * 9; // 9 hours

Update: (2009-12-07)
If the variable above doesn’t work for you maybe you can do this

/* Authentication type */
$cfg['Servers'][$i]['auth_type'] = 'config';
$cfg['Servers'][$i]['host'] = 'localhost';
$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = 'your-root-pwd';

Note/Warning/Security Concern:
Do this only on your local/development machine and not on production server !!!