27 Upgrade notes for 6.4.17

New index on auditlog table

A new index has been added to the auditlog table to improve database and frontend response times when filtering records by Recordset ID in the Audit log.

Note that users with large audit logs may experience extended upgrade times due to the database size.

Server to stop with read-only database

A standalone Zabbix server will now stop if the database becomes read-only.