> #### Reviewing the memory resource monitoring plan

> You do not have to set up monitoring plans and rules for your memory resource. Fathom automatically provides a default resource named Memory when you initially start up Fathom Management. You cannot delete this Fathom-provided default resource, nor can you change its name. However, you can change the values in the memory resource's monitoring plans definition and rules definition.

> To review the default memory resource monitoring plan:

> 1. Click Resources from the menu bar.
> 2. In the list frame, expand the System category.
> 3. Expand the Memory category, and click the Memory resource. The monitoring plan and a tabular and graphical representation of the memory status appear, as shown in the following example:

> 4. To review the values set in the memory resource's monitoring plan definition and rule definition, click the monitoring plan in the Name column. The monitoring plan for the memory resource appears:

> The default monitoring plan consists of the following monitoring plan definition values:

> - Schedule — Identifies the system-defined 24/7 default schedule used when the plan is active. The default is Default_Schedule.
> - Polling Interval — Identifies the polling cycle, which is the frequency at which the resource's rules are checked. The default is five minutes.
> - Alerts Enabled — Indicates whether alerts are active and will be generated when the plan is active. The default is true.
> - Trend Performance Data — Indicates whether you want to store performance data in the FathomTrendDatabase. The default is true.
> - Trend every — Indicates how often performance data is trended. The default is 1 poll.
> The default monitoring plan consists of the following rule definition values:

> - The Alert if system memory usage exceeds field indicates the threshold percent value that generates an alert. This alert indicates that the percentage of physical memory in use by the system has been exceeded.
> - The Alert if virtual memory usage exceeds field indicates the threshold value that generates an alert. This alert indicates that the percentage of virtual memory in use by the system has been exceeded.
> These memory-related statistics are displayed as single snapshots when Fathom polls the system to determine the amount of free virtual memory. For example, Fathom displays the amount of free virtual memory at a single instant. Therefore, these statistics are more likely to reflect random spikes in performance that might not accurately reflect overall performance. You should consider configuring these monitors so that an alert is not generated the first time the threshold is crossed, but only after it has been crossed enough times to validate concern about performance.

> - Alert severity — Identifies the severity level at which Fathom triggers an alert. The default is Error.
> - Throw alert after — Identifies at which point Fathom triggers an alert. The default is 2 failed polls.
> - On alert perform action — Identifies the action Fathom takes when an alert is generated. The default is Default Action.
> - Clear alert after — Identifies the number of successful polls after which Fathom clears the alert. The default is zero.
> - On clear perform action — Identifies a user-defined action or a compound action. For example, Fathom might run a job that was defined as an action. The default is None.

> ##### Trending performance data for memory resources

> Once you enable trending by selecting the Trend Performance Data field, you can also override the default value of 1 in the Trend Performance Data every poll(s) field. Any value that you enter in this field that is greater than the default value 1 causes a memory resource monitor to trend data that it gathered from the last poll, with the exception of page in and page out fields. Page in and page out data can only be queried through the FathomTrendDatabase.

> Note: The page in and page out values represent the delta values from the previous trend.

> ##### Editing the Memory resource defaults

> If you want to change any of the default memory resource monitor values, click Edit from the Monitoring Plan page. The Edit Memory Resource page shown in Figure 5–2 appears.

> Figure 5–2: Editing the Memory monitoring plan defaults

> Make any modifications you want and click Save. The Memory page opens and reflects any changes you have made.

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