How to: Instructions for Monitoring
This section describes Resource Monitors as they appears in Open Manage Network Manager’s web portal. The following describes these monitors:
• Application Server Statistics
• Resource Monitors
• Top N [Assets] (pre-configured monitors that come with your installation by default.
Finally, this chapter contains a reminder about scheduling refreshes of monitor target groups. See Scheduling Refresh Monitor Targets.
Monitors and Discovery
Not all monitors are enabled for devices discovered by default. Typically discovery adds devices only to ICMP (ping) monitoring. If you enable an SNMP monitor during discovery, for example, performance degrades if discovery finds devices with many interfaces that the monitor attempts to process.
To improve performance such behavior is disabled by default so processing occurs only for the ICMP Monitors. To re-enable processing for other monitors during discover (assuming they are enabled), set/create the following property in owareapps/installprops/lib/installed.properties:
By default, this is set to false. Monitors automatically refresh all implicit targets when a rule executes independently of discovery in roughly six hour intervals. Alternatively you can select the monitor(s), right mouse click and select Refresh Monitor to manually refresh the target.
Monitoring Database Size
Each row in the performance database will take up roughly 150 bytes. Multiply the number of metrics that the monitor is storing times the number of targets. That is the number of rows stored per polling interval.
Those raw data rows are rolled up to hourly data--one row per metric per target. Similarly, daily data rolls up every 24 hours. The retention policy dictates how long we will keep those rows.
Instructions for Monitoring
This chapter contains the following step-by-step instructions for these features:
• Create a Server Status Monitor Dashboard
• Create an SNMP Interface Monitor
• Create an ICMP Monitor
• Create a Key Metrics Monitor
• Create an Adaptive CLI Monitor
• Create a Monitor for an External Script
• Create a Monitor Report
• Create a Simple Dashboard View
• Create A Performance Template
You can see Performance Options from a variety of locations by right-clicking in Open Manage Network Manager. For example:
• Ports in the Ports portlet
• Ports / Interfaces in the Details panels lets you Show Performance
• Right clicking on any of the above within a Reference tree displays Performance Options.
• All Top N [Assets] right click to offer Performance options.
Monitors do not directly monitor string attributes, but you can create an extractive Adaptive CLI monitor that responds to string values in devices. See Example 5: Monitor Text Values for an example.