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3361119 - high disk usage under HISTORY_GB area

Symptom

You notice your data volume's usage is very high.

When you run script HANA_Disks_Data_Overview(note 1969700) to check further, you confirm that is HISTORY_GB consume most of the space.

And according to indexserver trace, there is huge amount of the following information recorded:

There are too many un-collected versions.
('number of versions > 1000000' or 'maximum number of versions per record > 100000')
The cursor possibly block the garbage collection of HANA database.

 "Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."


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Environment

  • SAP HANA PLATFORM EDITION 1.0
  • SAP HANA PLATFORM EDITION 2.0

Product

SAP HANA 1.0, platform edition ; SAP HANA, platform edition 2.0

Keywords

HISTORY_GB, garbage collection, un-collected versions, large disk size, maximum number of versions per record , KBA , HAN-DB , SAP HANA Database , HAN-DB-PER , SAP HANA Database Persistence , Problem

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