PHP ERROR - Message: fopen(/var/lib/php/sessions/..): failed to open stream: No space left on device

Hi,

I have gone through the community posts and still I face this Message: fopen(/var/lib/php/sessions/ci_sessiond0v4i5qeugpm0t9qodulbij3aoabot4b): failed to open stream: No space left on device issue persists.

Output for df -h

Filesystem Size Used Avail Use% Mounted on udev 3.9G 0 3.9G 0% /dev tmpfs 798M 636K 798M 1% /run /dev/vda1 155G 82G 74G 53% / tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/vda15 105M 3.6M 101M 4% /boot/efi tmpfs 798M 0 798M 0% /run/user/0

I still have space available, so that is not the issue. I have also gone through this post .

This error comes frequently, if I refresh then it might work for sometime. Then the same issue pops up again. Please help me resolve this, as this is affecting the user experience a lot.

Framework used - Codeigniter

Regards