How To Fix SDBALM184 - Low hit rate for SQL data in the data cache (&1&3 < &2&3)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 184

• Message text: Low hit rate for SQL data in the data cache (&1&3 < &2&3)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDBALM184 - Low hit rate for SQL data in the data cache (&1&3 < &2&3) ?

  The SAP error message SDBALM184 indicates that the hit rate for SQL data in the data cache is low, which can negatively impact the performance of your SAP system. The message typically includes specific values for the current hit rate and the threshold, which helps in diagnosing the issue.
  Cause:
  
  
  Low Cache Hit Rate: The primary cause of this error is that the SQL data cache is not effectively storing frequently accessed data, leading to a high number of cache misses. This can occur due to:
  
  Insufficient cache size.
  Inefficient SQL queries that do not leverage the cache effectively.
  Changes in data access patterns that result in previously cached data being less relevant.
  Fragmentation of the cache or poor cache management.
  
  
  
  High Workload: An increase in the workload or a sudden spike in user activity can lead to a situation where the cache cannot keep up with the demand.
  
  
  Configuration Issues: Incorrect configuration settings for the database or the SAP system can lead to suboptimal cache performance.
  
  
  Solution:
  
  
  Increase Cache Size: If the cache size is too small, consider increasing it. This can be done by adjusting the relevant parameters in the SAP system configuration.
  
  
  Optimize SQL Queries: Review and optimize SQL queries to ensure they are efficient and make better use of the cache. This may involve:
  
  Analyzing execution plans.
  Adding appropriate indexes.
  Reducing the complexity of queries.
  
  
  
  Monitor and Analyze: Use SAP transaction codes like ST02 (Buffer Monitor) and ST04 (Database Performance Monitor) to analyze the performance of the data cache and identify bottlenecks.
  
  
  Adjust Configuration Parameters: Review and adjust relevant configuration parameters in the SAP system and database settings to optimize cache performance. This may include parameters related to memory allocation and cache management.
  
  
  Regular Maintenance: Perform regular maintenance tasks such as database statistics updates and index rebuilding to ensure optimal performance.
  
  
  Consult Documentation: Refer to SAP Notes and documentation for specific recommendations related to your version of SAP and the database you are using.
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  ST02: Buffer Monitor - to check the performance of the data cache.
  ST04: Database Performance Monitor - to analyze database performance.
  ST03N: Workload Analysis - to analyze workload and performance metrics.
  
  
  
  SAP Notes: Search for relevant SAP Notes that may provide additional insights or specific fixes related to this error message.
  
  
  Performance Tuning: Consider engaging with SAP Basis or database administrators for performance tuning and optimization strategies tailored to your specific environment.
  
  
  By addressing the underlying causes and implementing the suggested solutions, you can improve the hit rate for SQL data in the data cache and enhance the overall performance of your SAP system.