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SMALL_MERGE_REPLACED - what does it mean

  • October 16, 2018
  • 3 replies
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MaciejPaliwoda
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Hello all,
I have a huge number of query events: SMALL_MERGE_REPLACED
is this related to MERGE command or MERGE JOIN or sth else?

What could be the remediation action - rewriting query? projection redesign? any hints are welcome.
Thx in advance.
M.

3 replies

MaciejPaliwoda
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  • October 16, 2018

Found by Accident in some old documents: Small StorageMerge replaced with StorageUnion for efficiency

Is this sth what we could optimize, number of events is aprox 1M.


chaima
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  • October 22, 2018

Hi Maceij,

To my understanding it's an informational event (meaning that Vertica has chosen a more efficient way to access the data by replacing a merge) so it's not an addressable issue, not sure if that's something that can be optimized.

Chaima


MaciejPaliwoda
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  • December 13, 2018

thanks Chaima.