Plesk shows the error in the browser:
ERROR: Zend_Db_Statement_Exception: SQLSTATE[HY000]: General error: 1021 Disk full (/tmp/#sql_4f20f_5); waiting for someone to free some space... (Pdo.php:234)
The error is coming from MySQL server:
Error: 1021 SQLSTATE: HY000 (ER_DISK_FULL) Message: Disk full (%s); waiting for someone to free some space...
The error is self-explained. The mentioned partition in the does not have enough disk space.
Free up disk space on the the /tmp partition.
There are a lot methods to increase free disk space on the partition:
For example, you can mount the additional partition with bind option instead:
mount -o bind /var/tmp/ /tmp/
And add the following line to
/var/tmpfs /tmp none bind 0 0
- If the server's filesystem has configured LVM you can extent the
/tmp. See more details by link "Extending a logical volume"