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Foglight Experience Monitor 5.8.1 - User Guide

Installing and configuring Multi-appliance clusters Configuring the appliance Specifying monitored web traffic Transforming monitored URLs Managing applications Foglight components and the appliance Using the console program Troubleshooting the appliance Appendix: Third party software Monitoring the user experience Customizing reports The alarm system Integrating the appliance SOAP-based web services

Metric view alarms

By clicking any alarm link in the alarm column the Metric View opens and displays detailed information the single metric.

The Time Range controls are also found in the customization panel, and allow you to specify a specific time range for which you would like to see data. Click Time Range to specify a custom time range for the display. The boxes to the right allow to specify the desired starting and ending dates and times for the display.

The Detail box allows you to specify the level of detail (for example, hourly, daily) in the data that you would like to view. This selection applies only when you have chosen a custom time range.

The appliance generally displays the highest granularity of data available unless:

In these cases, the appliance displays the most detailed data available based on your request.

On Metric View pages, you can typically find a Diagnosis section below the data chart. Links found in this section allow you to explore other resources associated with that which you are currently examining.

Metric View pages typically end with a Diagnosis section that allow you to analyze related resources.

If for example, you are viewing a metric for a web page that includes page components (for example, graphics files, style sheets, Javascript files), three links appear in the Diagnosis section: Hit, Root Cause Explorer, and Create a Service Based on this page.


This section contains links to the documentation PDFs. The link to the Installation and Administration Guide only appears for administrators.

This section contains links to the SNMP and MIB configuration files. These files are used to configure SNMP traps.

Edit report set

This page displays which reports are currently included in the report set, and lists them in the Reports section. You can modify the contents of the report set using the settings on this page.

Type information in the Title and Description boxes. It is important that you type descriptive and accurate details; once saved, the report set becomes accessible from different parts of the system, and it is far easier to locate a report set whose name and description are meaningful, yet succinct.

Use the Type box to place the report set in one of several categories. The report sets that are available by default represent a wide variety of perspectives that can be used to view data gathered by the appliance. Report sets can be classified into three main groups:

Business Report Sets—these reports provide high level views from the perspective of the business conducted on your sites.
System Report Sets—these reports provide system level perspectives (for example, back-end performance, and site performance summaries).
Diagnosis—these reports facilitate the diagnoses of system issues in real time (for example, slowest secure Web pages, busiest Web pages), and are further divided into subcategories.

Again, it is important that the report set is placed in a category that matches its contents, as your choice affects its placement in report set lists in several areas of the Web console interface.

By default, a report set displays its contents in one column. Select the Display report set in two columns check box to fit more reports into the same latitudinal space.

This section allows you to specify the metrics and resources to display in the chart.

Click this link to open a window where you can select the metric to appear in the chart. If you have already chosen a metric that is a reference counter or distribution metric this link will not appear since only one metric of these types can be displayed in the same chart.

Once you have added a metric, you will be able to define the label for this metric that will be used in the display as well as the specific resource that will provide the data.

In the Metric box the name of the metric you have chosen will appear.

In the Label box for each metric you can specify a label that will appear in the legend for that metric. The label will be initialized with default values based on the metric you selected.

Click this link to open a window that allows you to choose the resource that will supply the metric data. When you click the resource in the list the box to the right of the link will display the name of that resource.

Click the up arrow will move the individual metric up a single space in the list.

Click the down arrow will move the individual metric down a single space in the list.

To remove metrics, click the button after selecting any of the checkboxes below it.

System health

This page displays critical System Health metrics that provide a snapshot of how the appliance is performing. For a detailed explanation of each metric consult the Foglight Experience Monitor User Guide.

This display reports on memory and CPU usage by the appliance over a period of time (default: two hours). Generally, memory usage and CPU usage up to 80% capacity is tolerable. If usage of either resource exceeds 80% of the total capacity, the appliance is overloaded. If this occurs regularly, it is indicative that the appliance work load should be lightened by reducing the number of monitored servers.

This display indicates whether the appliance agent’s performance has degraded enough to generate a system-level event. This includes low memory warnings and agent restarts.

The two agent-specific reports show how many times the agent’s memory use exceeded its allocated share, and how often it had to restart. Agent restarts can happen for various reasons, including the exceeding its allocated share of memory. In most cases, incidents of continuous memory warnings and restarts indicate the appliance is overloaded, and can be remedied by reducing the number of monitored servers.

The appliance agent is a component of the appliance, or system as a whole. Memory consumption for the entire system is also reported here, and can help confirm whether other non-agent resources are contributing to high memory usage.

This display reports how long it takes for records to be loaded to and from the database during a standard five-minute cycle over a period of time (default: two hours). Database loading occurs whenever incoming traffic data is written, or existing data is called through report generation in the web console.

It is not unusual for the displayed load time to exceed thirty seconds; however, if this occurs consistently, it is indicative that preventative or corrective measures should be taken. The latter is accomplished by making better use of filters when searching through resources. Preventative measures include reducing the number of monitored servers, or creating URL transformations that result in fewer processed URLs.

This display summarizes all transmission-related errors over a period of time (default: two hours). Rates are reported for:

All of these reported rates should be zero, or at a low percentage. High rates occur for different reasons, depending on the type of error. For example, dropped packets or missing segments are signs that the appliance may be overloaded. Meanwhile, SSL errors can happen for a variety of reasons, including incorrectly configured SSL keys, security-related communication conflicts, or errors from dropped packets or missing segments.

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