How To Fix SDBALM085 - Hit rate for the history/undo data in the data cache (in %)

SDBALM085 - Overview

• Message type: E = Error

• Message class: SDBALM - SAP DB and liveCache Alert Monitoring

• Message number: 085

• Message text: Hit rate for the history/undo data in the data cache (in %)

Description
The system calculates and displays the hitrate since the last run of
the data collector. In the case of the first run of the data collector
after a restart of the instance or after the Alert Monitor is started,
the system does not display a hitrate.
Data Collector
<ZH>Collector B</>
(RZ20 -> SAP CCMS Technical Experts Monitors -> All Monitoring Contexts
,,-> <Name of the database connection> -> Collectors and Internals
-> Collectors -> Collector B)

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Preset runtime interval of Collector B: 15 minutes

Error message extract from SAP system. Copyright SAP SE.

SDBALM085 - Details

• The SAP error message SDBALM085 indicates that there is a concern regarding the hit rate for the history/undo data in the data cache. This message is typically related to the performance of the database and the efficiency of the data cache in handling requests.
  
  Cause:
  The hit rate for the history/undo data in the data cache is a performance metric that indicates how often the system is able to retrieve data from the cache rather than having to access the database directly. A low hit rate can be caused by several factors, including:
  
  Insufficient Cache Size: The data cache may not be large enough to hold all the necessary data, leading to frequent cache misses.
  High Volume of Transactions: A high number of transactions can lead to rapid turnover of cached data, resulting in a lower hit rate.
  Inefficient Data Access Patterns: If the application accesses data in a way that does not align well