In my local development Ubuntu box I use MySQL and phpmyadmin to work with the database.
Whenever phpmyadmin is idle for 1440 secs (24min) the session expires. I lose m
steps to change cookie expiration
step 1:Go to settings of Phpmyadmin
step 2:General
step 3:Login cookie validity
step 4:Update 1440 seconds default cookie expiration time with your new value