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2950474 - DB table growth in SAP Hana related to Packed LOB's

Symptom

  • In SAP Hana Database, you encounter an issue where disk space is growing
  • Even after cleanup of table data and reclaim as per SAP KBA 2696420 How to Manually Reclaim LOB space on Hana, the /hana/data size does not decrease significantly
  • Perhaps the table involved is already known to you, but if not you can run the HANA_Tables_LargestTables_* query from note 1969700 SQL Statement Collection for SAP HANA
  • In the column LOB_DISK_GB, you can identify a large amount of space is taken up by LOB data
  • To further drill down on the type of LOB data, execute the HANA_Disks_Data_Overview_* script from note 1969700
  • Here you find a significant portion of the space is related to Packed LOB data i.e. column PLOB_GB 


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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 ; SAP NetWeaver 7.5

Keywords

Hana 1.0, Hana 2.0, Garbage collection, DB growth, exponential, reclaim, defragment , KBA , HAN-DB-PER , SAP HANA Database Persistence , Problem

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