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DataMiner: Trend Graph

Solved1.94K views19th July 2023polling trending
2
Jeyaram Sumanthiran30 7th December 2020 0 Comments

What is polling interval for Avg and real-time trending? Can we change the polling interval for trending?

Marieke Goethals [SLC] [DevOps Catalyst] Selected answer as best 19th July 2023

3 Answers

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Michiel Saelen [SLC] [DevOps Enabler]5.63K Posted 7th December 2020 0 Comments

Hi Jeyaram, The polling interval for real-time trending depends on your driver/protocol. In your protocol there will be some timers defined and in most cases this will be linked with the polling intervals to retrieve information from your device and store this into parameters in DataMiner (see screenshot for an example of timers). When the driver updates a parameter in DataMiner that has real-time trending it will add an extra trend point to your graph. So if you have a lot of real-time trending on a lot of parameters that update a lot you will have a very big load on your DB.

For average trending you have 5 min average records, hour records and day records that are stored in DB. Depending on your settings these can be kept longer in your system (see screenshot). So DataMiner will keep the average, min and max value of every parameter and store this value every 5 min (if a change was detected).

Note:
It is possible to change the 'Timer base' for every element (see screenshot) to increase or decrease the frequency to which your timers are executed.

 

Marieke Goethals [SLC] [DevOps Catalyst] Selected answer as best 19th July 2023
0
Paul Schlagheck Posted 28th January 2021 0 Comments

The timer base can go between 0 and 10.  What exactly does this do?  If it sets the real-time trending timer, then why is it limited to 10 and not 30 which is the default?  Where do you set the real-time trending timer for the system?

Paul Schlagheck Answered question 28th January 2021
0
Koen Cools [SLC] [DevOps Member]314 Posted 7th December 2020 0 Comments

Hi Jeyaram, be aware that you can use the window attribute to define for which time window (interval) the average values has to be calculated, this can be done with the MaintenanceSettings.xml (https://help.dataminer.services/dataminer/#t=DataMinerUserGuide%2Fpart_7%2FSkylineDataminerFolder%2FMaintenanceSettings_xml.htm&rhsearch=trending%20interval&rhsyns=%20).

Koen Cools [SLC] [DevOps Member] Answered question 7th December 2020
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