Data elements are values returned by the database system monitor when a performance snapshot is taken, (snapshot monitoring), or an event takes place, (event monitoring).
Data elements are classified by the following categories:
A counter counts the number of times an activity occurs. Counter values increase during monitoring, and can only be decremented by resets.
A gauge indicates the current value for an item. This value can go up and down depending on database activity (for example, the number of locks held).
Highest is an indicator of the high water mark or the maximum value an element reached since monitoring was started.
An information element provides reference-type details of your monitoring activities. This can include items such as node names, aliases, and path details.
A timestamp indicates the date and time that an activity took place, by providing the number of seconds and microseconds that have elapsed since January 1, 1970. In the C language, for example, this can be converted to calendar date and time using the ctime() function.
For detailed information on data elements, see the System Monitor Guide and Reference.
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