Skip to content
DataMiner DoJo

More results...

Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors
Search in posts
Search in pages
Search in posts
Search in pages
Log in
Menu
  • Blog
  • Questions
  • Learning
    • E-learning Courses
    • Open Classroom Training
    • Certification
      • DataMiner Fundamentals
      • DataMiner Configurator
      • DataMiner Automation
      • Scripts & Connectors Developer: HTTP Basics
      • Scripts & Connectors Developer: SNMP Basics
      • Visual Overview – Level 1
      • Verify a certificate
    • Tutorials
    • Video Library
    • Books We Like
    • >> Go to DataMiner Docs
  • Expert Center
    • Solutions & Use Cases
      • Solutions
      • Use Case Library
    • Markets & Industries
      • Media production
      • Government & defense
      • Content distribution
      • Service providers
      • Partners
      • OSS/BSS
    • DataMiner Insights
      • Security
      • Integration Studio
      • System Architecture
      • DataMiner Releases & Updates
      • DataMiner Apps
    • Agile
      • Agile Webspace
      • Everything Agile
        • The Agile Manifesto
        • Best Practices
        • Retro Recipes
      • Methodologies
        • The Scrum Framework
        • Kanban
        • Extreme Programming
      • Roles
        • The Product Owner
        • The Agile Coach
        • The Quality & UX Coach (QX)
    • DataMiner DevOps Professional Program
  • Downloads
  • More
    • Feature Suggestions
    • Climb the leaderboard!
    • Swag Shop
    • Contact
      • General Inquiries
      • DataMiner DevOps Support
      • Commercial Requests
    • Global Feedback Survey
  • PARTNERS
    • All Partners
    • Technology Partners
    • Strategic Partner Program
    • Deal Registration
  • >> Go to dataminer.services

Way to avoid an alarm storm to create excessive “alarm history exceeded alarms” in the database?

Solved2.05K views16th March 2023alarms configuration MaintenanceSettings.xml MySQL
4
Ryan Reuss [SLC] [DevOps Member]490 1st September 2020 0 Comments

Hello Dojo,

(DataMiner 9.6 CU16 running MySQL)

I was searching for some clarification as to these settings in the MaintenanceSettings.xml found on the help page below:

https://dcp.skyline.be/Help/index.html#t=DataMinerUserGuide%2Fpart_7%2FSkylineDataminerFolder%2FMaintenanceSettings_xml.htm

We have set this to false but it seems these items are still logged into the database regardless of this setting, and after reading more closely it seems this only affects client side, where the database entries will still exist every time the alarm exceeded 100 alarms.

How does this work in the software? Every alarm after the 100th alarm seems to create a new database entry with value equal to "alarm history exceeded 100 alarms".

  • It seems the alarm storm is due to a configuration issue within the timeout settings of the communication state of the driver.
  • The side effect of these 'alarm history exceeded alarms' in the service alarm table is actually worse than the alarm storm itself - see below:

  • Counts were 2 million entries per day causing the service alarm table to grow past 36G.
  • This caused many SLDataminer RTEs as a result of such large database tables and their DMA completely froze (unresponsive database due to many failed queries).

Is there a way to avoid an alarm storm event creating excessive "alarm history exceeded alarms" in the database?

Ryan Reuss [SLC] [DevOps Member] Selected answer as best 16th March 2023

3 Answers

  • Active
  • Voted
  • Newest
  • Oldest
5
Marlies Vandenberghe [SLC] [DevOps Member]2.97K Posted 2nd September 2020 0 Comments

It should indeed only generate 1 entry per alarm

when the option is set to true this would be expected behavior, also note that systems that were installed many years ago, this setting was standard set to true, nowadays this is set to false because of the major overhead in the database.

So in case you see these amount of notices it's worth checking that specific setting.
If it's set to false then there are only 2 options:
1) DataMiner has trouble reading in this file/setting, that could be because someone changed a setting in this file that might be incorrect or didn't include the correct xml tags

2) this is a software issue and the behavior isn't correct in some corner cases.
Explaining the corner case how to reproduce these amount of notices should suffice to get a fix for this

In the meantime i would suggest to disable this notice entirely to prevent further impacting issues

Ryan Reuss [SLC] [DevOps Member] Selected answer as best 16th March 2023
5
Wouter Demuynck [SLC] [DevOps Advocate]5.91K Posted 2nd September 2020 0 Comments

Also note that the parameter ids (pids) in screenshots are all 64501, which is the "Timeout" parameter. Not sure whether this coincidence or whether all of these notices are being generated on this same parameter.

It might be useful to inspect the alarm trees that get generated on these parameters to see whether these trees really have that many updates and to know where the updates originate from.

Wouter Demuynck [SLC] [DevOps Advocate] Answered question 2nd September 2020
3
Michiel Saelen [SLC] [DevOps Enabler]5.63K Posted 2nd September 2020 0 Comments

Hi Ryan,

One of the questions that comes up when reading the post is why you would need 2million alarms/day or alarm updates?
If you don't need all of these entries I would advise you to review the alarm template to fit the needs of the operators that need to monitor the system as I doubt that they will look at so many alarms.

Next to that, it does indeed seem an issue that there is an entry created every time there is a new alarm entry on the tree.
Therefor you could create a task.

Michiel Saelen [SLC] [DevOps Enabler] Answered question 2nd September 2020
Please login to be able to comment or post an answer.

My DevOps rank

DevOps Members get more insights on their profile page.

My user earnings

0 Dojo credits

Spend your credits in our swag shop.

0 Reputation points

Boost your reputation, climb the leaderboard.

Promo banner DataMiner DevOps Professiona Program
DataMiner Integration Studio (DIS)
Empower Katas

Recent questions

Alarm Dashboard PDF/CSV Export 0 Answers | 0 Votes
Is the Microsoft SharePoint Connector Still Usable 0 Answers | 0 Votes
Is the Microsoft SharePoint Connector Still Usable 0 Answers | 0 Votes

Question Tags

adl2099 (115) alarm (62) Alarm Console (82) alarms (100) alarm template (83) Automation (223) automation scipt (111) Automation script (167) backup (71) Cassandra (180) Connector (108) Correlation (68) Cube (150) Dashboard (194) Dashboards (188) database (83) DataMiner Cube (57) DIS (81) DMS (71) DOM (139) driver (65) DVE (55) Elastic (83) Elasticsearch (115) elements (80) Failover (104) GQI (159) HTTP (76) IDP (74) LCA (151) low code app (166) low code apps (93) lowcodeapps (75) MySQL (53) protocol (203) QAction (83) security (88) services (51) SNMP (86) SRM (337) table (54) trending (87) upgrade (62) Visio (539) Visual Overview (345)
Privacy Policy • Terms & Conditions • Contact

© 2025 Skyline Communications. All rights reserved.

DOJO Q&A widget

Can't find what you need?

? Explore the Q&A DataMiner Docs

[ Placeholder content for popup link ] WordPress Download Manager - Best Download Management Plugin