Collectors

Monitoring Your Collectors

Introduction to Monitoring Your Collectors

The LogicMonitor Collector is the heart of your monitoring system. As such, it's important that you monitor your Collectors to ensure that performance is keeping up with data collection load. Equally important is ensuring the least disruption possible when a Collector does go down. This includes making sure timely notifications are delivered to the appropriate recipient(s).

As best practice, LogicMonitor recommends that you (1) set up monitoring for your Collectors and (2) configure notification routing for Collector down alerts.

Adding the Collector Host into Monitoring

If it isn't already part of your monitoring operations, add the device on which the Collector is installed into monitoring. This will allow you to keep tabs on CPU utilization, disk space and other metrics important to smooth Collector operation. For more information on adding devices into monitoring, see Adding Devices.

Enabling Collector DataSources on the Host

LogicMonitor provides a series of built-in Collector DataSources that provide insight into a Collector's operations, performance, and workload. You can see these DataSources (Settings | DataSources) in the default "Collector" folder that comes with your LogicMonitor account.

In most cases, these Collector DataSources will be automatically applied to the Collector device when you add it into monitoring. You can verify this is the case by expanding the device in the Resources tree and looking for the "Collector" DataSource group.

Verify Collector DataSources have been applied to the Collector device by expanding the device in the Resources tree and looking for the "Collector" DataSource group

If the Collector DataSources were not automatically applied to the device, you can do so manually by adding the value of "collector" to the device's system.categories property. For more information on setting properties, see Device Properties.

LogicMonitor will now index this device as the host of a Collector, and automatically apply the Collector DataSources to it. Once Collector DataSources are in place, you can configure alerts to warn you when Collector performance is deficient.

Note: Collector DataSources only monitor the device's preferred Collector (as established in the device's configurations). The preferred Collector should be the Collector that is installed on that device. Otherwise, the Collector's metrics will display on the wrong host. For example, if you attempt to monitor Collector A using Collector B (installed on a separate host), then Collector B's metrics will display in lieu of Collector A's on Collector A's host.

Collector Data Collecting Tasks DataSource

One of the Collector DataSources applied is the "Collector Data Collecting Tasks" DataSource. It monitors statistics for collection times, execution time, success/fail rates, and number of active collection tasks. One of the overview graphs available for this DataSource features the top 10 tasks contributing to your Collector's load, which is extremely useful for identifying the source of CPU or memory usage.

The Top 10 Collection Tasks overview graph is extremely useful for identifying the source of CPU or memory usage

Routing Collector Down Alerts

A Collector is declared down when LogicMonitor's servers have not heard from it for five minutes. Even though you will likely have a backup Collector in place for when a Collector goes down, it's never an ideal situation for a Collector to be unexpectedly offline. To minimize downtime and mitigate the risk of interrupted monitoring, ensure that Collector down alerts will actively be delivered (i.e. alert notifications will be routed to recipients via email, text, etc.) to the appropriate individuals in your organization (in addition to being displayed in the LogicMonitor interface).

Note: When a Collector is declared down, alerts that were triggered by the devices monitored by that Collector before the Collector went down will remain active, but no new alerts for those devices will be generated while the Collector is down.

To route Collector down alerts, open the Collector's configurations (Settings | Collector | Manage) and specify the following:

  • Collector Down Escalation Chain. As discussed in Escalation Chains, an escalation chain specifies what people, or groups of people, should be notified of the alert, how they should be notified, and in what order.
  • Resend interval. From the Send Collector Down Notifications field, set the resend interval for Collector down notifications. You can indicate no resend (i.e. notification is only sent once) or you can indicate the amount of time that should pass before the Collector down alert notifications are escalated to the next stage in the escalation chain. If the alert has reached the final stage or there is only one stage specified in the escalation chain, then this interval, when set, determines how often the alert notification will be resent until it is acknowledged or cleared.