History Tab in the Web Console Attribute Editor

Use the History page in the Attribute Editor to save older data for a monitored property. For example, you might choose to record a history of data points every 120 seconds as identified in the sample interval. You can also specify whether to store this information in a disk file or in the memory cache.

The two types of disk files are circular, which has a maximum of 1000 lines, and text. These files are located in the /var/opt/SUNWsymon/log directory in the file that is specified in the Text File Name field.

A circular disk file is automatically saved under the name history.log. If you do not choose a file name for your text file, data are automatically saved under the name agent_default.history.

If you select memory cache, you must indicate in the Max Size (sample) field the number of data points to save. For example, if you set this field to 1000, only the most current 1000 data points are stored in the memory cache. Any older data points are discarded. These data points can be graphed. See Chapter 9, Viewing Data Properties in a Graph for more information.

You can view history data in a graph by opening the graph for the specific monitored property. If you have selected memory cache, the graph is displayed with historical data.