nearly full partition seen on df...is this a problem? | pressku.com

Periodically I cheque my drives to spot if immoderate are full. df -h gives: Filesystem Size Used Avail Use% Mounted on tmpfs 1.6G 2.1M 1.6G 1% /run /dev/sda2 457G 124G 311G 29% / tmpfs 7.8G 0 7.8G 0% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock efivarfs 128K 122K 1.5K 99% /sys/firmware/efi/efivars /dev/sda1 511M 6.1M 505M 2% /boot/efi /dev/sdc2 922G 458G 417G 53% /media/bob/mybook1 /dev/sdc5 912G 182G 685G 21% /media/bob/mybook2 /dev/sdb3 931G 647G 284G 70% /media/bob/fedora_localhost-live tmpfs 1.6G 3.2M 1.6G 1% /run/user/1000

My mobility is nan /sys/firmware/efi/efivars partition. Is this a problem that it is 99% full? If so, really do I hole it.

Thanks