This persistent variable indicates the desired severity level for adding a system event to the log based upon a severity level. This control variable thus acts as a severity level filter. This only applied to system events that DO NOT effect health. Health effecting events are always added to the system log. 'critical' is the highest severity level, followed in decreasing order by 'major', 'minor', 'warning', and 'normal', which is the lowest severity level. Specifying a severity level with this variable indicates that log events of that level and higher and log events not controlled by a severity filter will be considered for addition to the system log. These events will be added, unless the log is full ( 'logCurrentSize' equals 'logMaxSize') and replacement rules do not allow the event to be added. Replacement rules only allow a new event to replace a lower severity level event or an equal severity event that is older. Setting this variable to 'critical' is the most restrictive. Only log events with a severity level of critical, or that do not use a severity level will be considered for addition, unless limited by replacement rules. Setting this variable to 'normal' allows all system events to be considered for addition, unless limited by replacement rules. The default value for this variable is 'normal'.