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Home > Success Center > Network Performance Monitor (NPM) > NPM - Knowledgebase Articles > Poller Status Warning: A poller is either approaching or in excess of its polling rate limit

Poller Status Warning: A poller is either approaching or in excess of its polling rate limit

Updated: January 16, 2019

Overview

The following warning is displayed in the Web Console:

Poller Status Warning: A poller is either approaching or in excess of its polling rate limit

Environment

  • Orion Platform 2011.1 and later

Cause 

This warning is displayed whenever your SolarWinds installation has determined that it may be experiencing an excessive polling load. SolarWinds optimizes monitoring performance by automatically balancing polling intervals in heavy polling environments.

 

To accomplish this balance, SolarWinds automatically extends configured polling intervals to decrease the overall polling load in your environment.

 

To determine when this polling rate adjustment should occur and when users should be notified, SolarWinds has established two polling rate thresholds:

  1. A polling warning level
  2. A maximum polling limit level

These levels are based on an internal calculation that includes both the number of network objects polled and the configured polling interval (the generalized rule of thumb is 10,000 elements at default polling intervals).

Notes about polling enhancements

As a result of these polling enhancements, it is no longer necessary for a user to compensate for performance issues by manually setting polling rates higher than required to ensure that data is actually polled as frequently as desired. All polling jobs will be completed.

  • If the polling rate is more than the server can handle, the polling intervals are automatically increased to handle the higher load.  
  • That being said, too many elements on a single poller can compound various issues and have a negative impact on your SolarWinds server.
  • Whenever possible, stay under the recommended element count. If you find that you are polling a very large number of elements, look into implementing additional pollers.

Resolution

In environments where multiple SolarWinds polling engines are installed, determine the overloaded polling engine as indicated in the following procedure:

  1. Log in to your SolarWinds Web Console using an account with administrative privileges.
  2. Go to Settings > Polling Engines.
  3. Review the information provided on the Polling Engines view to determine the source(s) of your excess polling load.

If the polling rate has reached or exceeded 85% of the server's maximum polling rate, a Poller Status Warning is displayed in the Web Console.

 

If the measured polling rate reaches the server's maximum polling rate of 100%, configured polling intervals are automatically adjusted to decrease the polling rate. 

Polling Rate Issues

The following are options for addressing polling rate issues:

  • If you need to continue monitoring all currently monitored nodes, install and configure one or more additional polling engines. For more information, see Using Additional Polling Engines in your product's administrator guide.
  • If you can delete some nodes from monitoring or if you do not need to continue monitoring some nodes on the current polling interval, you may be able to restore previous polling intervals by removing nodes from monitoring, as indicated in the following procedure.

Decrease the polling rate in your environment

It may take 10-20 minutes to see the results of any polling adjustments.

  1. If there are nodes for which monitoring is a lower priority, edit the individual nodes and extend their polling intervals (increase the time between polls).
  2. If there are nodes for which monitoring is not a priority, delete the nodes themselves or delete monitored network objects on these nodes.
  3. Go to Settings > Polling Settings, to globally apply new polling rates. Within the Polling Settings page there is a Polling Intervals section and a Polling Statistics Intervals section. 
    • The Polling Interval is the up or down status
    • The Statistics polling is everything else (CPU, Memory, Bandwidth Utilization, and so on) 

    Note that the Statistics Intervals have a larger impact than the regular Polling Interval.

 

Altering the polling rate or the number of elements polled by a polling engine is the only way to reduce the polling load on the server.

 

While the product will compensate for a heavily populated installation (by increasing the polling interval on the back end), SolarWinds recommends that you try to stay under the polling limit to avoid compounding issues with your installation.

 

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