SAP Knowledge Base Article - Preview

1977269 - How to handle HANA Alert 45: 'Check memory usage of main storage of column-store tables'

Symptom

  • You receive HANA Alerts 45 Memory usage of main storage of column-store tables.
  • Access to this table may become slow.
  • Delta merges on this table may fail with error or do not even start automatically. 
  • Overall memory consumption may be very high and lead to Out-of-memory situations and column store table unloads. 
  • In case of mass changes or when there is a resource bottleneck in the system due to high load, several occurrences of this alert may occur in parallel.

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Environment

SAP HANA Database

Product

SAP HANA, platform edition all versions

Keywords

allocation limit; merged; Table Partitioning; Data Volume Management; house keeping; Sizing; hardware resources; , KBA , HAN-DB-MON , SAP HANA Monitoring , SV-PERF , Performance Messages , How To

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