session_start() failed no space left on device (28)

This morning I found that most of my sites are either blank or having some error message such as this: Warning: session_start(): open(/tmp/sess_8c125544dd7a170503b284e020e59e09, O_RDWR) failed: No space left on device (28) in /home/betaedel/public_html/system/library/session.php on line 11

Trying to googling around the web for answer, and apparently most people say about /tmp is full. But from what I see here, it’s not really full yet Device Size Used Available Percent Used Mount Point /dev/vda1 30G 15G 14G 51% / /usr/tmpDSK 1.2G 341M 795M 31% /tmp

Honestly I’m total newbie for the unix commands. I’m using Cpanel/WHM on CentOS 6.4, hoping that by Cpanel I dont have to deal much with console commands. Any help or info is much appreciated. Regards,

Hero Wijayadi

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I started deleting the session files in /tmp/ folder and now my site shows a DB connection error.  What should I do??

have you try to check your php session log?