I’ve had some problems on a Magento installation where all inodes are used up to store the session data. To fix this I had to configure Magento to store the sessions in the database instead of the file system. This is how I didi it:
1. Edit the local.xml configuration file and locate this line: (pico app/etc/local.xml)
<session_save><![CDATA[files]]></session_save>