How To Fix SDBALM083 - Hit rate for the OMS data in the data cache in %

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 083

• Message text: Hit rate for the OMS 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDBALM083 - Hit rate for the OMS data in the data cache in % ?

  The SAP error message SDBALM083 indicates that the hit rate for the Online Message Service (OMS) data in the data cache is below an acceptable threshold. This message is part of the SAP database performance monitoring and is related to the efficiency of the data cache in handling requests.
  Cause:
  The hit rate for the OMS data in the data cache is a measure of how often the requested data is found in the cache versus how often it has to be retrieved from the database. A low hit rate can be caused by several factors, including:
  
  Insufficient Cache Size: The cache may not be large enough to hold frequently accessed data.
  High Volume of Unique Requests: If there are many unique requests for data, the cache may not be able to store all of them effectively.
  Inefficient Data Access Patterns: If the application is accessing data in a way that does not take advantage of caching, it can lead to a low hit rate.
  Configuration Issues: Incorrect configuration settings for the cache can lead to suboptimal performance.
  Database Performance Issues: If the underlying database is slow or experiencing issues, it can affect the cache hit rate.
  
  Solution:
  To address the SDBALM083 error, consider the following solutions:
  
  Increase Cache Size: If possible, increase the size of the data cache to accommodate more data.
  Optimize Data Access Patterns: Review the application’s data access patterns and optimize them to make better use of the cache.
  Monitor and Adjust Configuration: Check the configuration settings for the cache and adjust them as necessary to improve performance.
  Analyze Database Performance: Use database performance monitoring tools to identify and resolve any underlying issues that may be affecting performance.
  Regular Maintenance: Perform regular maintenance on the database and cache to ensure optimal performance.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like ST02 (Tune Summary) to monitor buffer and cache performance.
  SAP Notes: Check SAP Notes related to cache performance and optimization for specific recommendations and updates.
  Performance Monitoring: Regularly monitor the performance of your SAP system to identify trends and potential issues before they become critical.
  Documentation: Refer to SAP documentation for detailed information on cache management and performance tuning.
  
  By addressing the underlying causes and implementing the suggested solutions, you can improve the hit rate for the OMS data in the data cache and enhance overall system performance.