New metrics can be created and existing metrics can be used or modified. Holistix Web Manager comes with more than 160 predefined metrics. That is, if an existing metric is modified, the modifications apply to any profile in which that metric is used. Creating new metrics requires that the data sources associated with the metrics are defined and configured. Additional data sources that cannot be used in profile metrics are available as dedicated monitors, such as DNS and Mail monitors.
Some data sources require an instance value.
That is, since Web Manager cannot know beforehand what physical disks are present on the system, instance data for this metric is required. Before a new profile can be created and applied to a system, you must determine which data sources are Supported by the web components you intend to monitor. Other SNMP queries are more complex because a value must be extracted from a table. The index into the table is dynamically determined by finding the index of the column containing the string value configured below. Web Manager uses this string to find the index for a table-get.