ID: 15639
Title: Predictive Levels: Suppress levels if standard deviation is undefined
Component: Checks & agents
Level: 2
Class: Bug fix
Version: 2.3.0b1
This change affects users of the option <tt>In relation to standard
deviation</tt> from
<tt>Predictive Levels</tt>.
<tt>Predictive Levels</tt> are computed by considering every data point
matching the configured
reference period. If there is only a single data point available, the standard deviation
is
undefined. Previously, since the standard deviation was unavailable, Checkmk would use the
absolute
value of the reference value. In particular, if the reference value was 0, then this would
result in
a CRIT.
With this Werk, no levels are applied, if the standard deviation is undefined.
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