What would cause a DMA to take more than 1 hour “starting elements”?

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MYSQL Failover system was upgraded from 9.0 to 9.5 CU12.

After upgrade, a manual failover test was initiated and attempted (3 times) to bring backup agent online (none successfully). Primary starts up very quickly.

SLDataminer log indicates the following:

Ryan Reuss [SLC] [DevOps Advocate] Selected answer as best 14th July 2020

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This is typically caused by a large amount of offload files that exist on the 'backup DMA'.  This gets somehow confirmed by the following lines: 'Aborting open offloads...'.

Check in the following folder:

C:\Skyline DataMiner\System Cache\Local

If there are too many files, it might be interesting to understand why this specific folder holds a lot of files.  Possible options:

  • the connection towards the local MySQL DB is not good
  • there are elements generating a lot of data to be offloaded (trend or element data)
  • overload of alarm/information events
  • resource problem
  • ...
Ryan Reuss [SLC] [DevOps Advocate] Selected answer as best 14th July 2020
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