I use phpmyadmin to create mysql database. And I have set the auth type to cookie in the config.inc.php. How do I change the time limit so that even if I logged in I stayed
You can avoid cookie authentication altogether and use
$cfg['Servers'][$i]['auth_type'] = 'config';
in your config.inc.php file found under the phpmyadmin folder.
config.inc.php
phpmyadmin
This will keep you logged in forever.