i have facing the issue now like.
DB query failed: SQLSTATE[HY000]: General error: 1 Can't create/write to file '/var/tmp/#sql_381_0.MAI' (Errcode: 28), query was: DESCRIBE `sessions`
that's why Magento 1.x admin panel and frontend not working.
admin panel not logged in.
My site is inaccessible. please give me some suggestions on this issue.
or should I need to concern with the hosting provider for this?