How To Fix LVCALM031 - SQL data cache hit rate in %

SAP Error Message - Details

• Message type: E = Error

• Message class: LVCALM - liveCache: Alert Monitor Objects and Attributes

• Message number: 031

• Message text: SQL data cache hit rate in %

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 LVCALM031 - SQL data cache hit rate in % ?

  The SAP error message LVCALM031 relates to the SQL data cache hit rate, which is an important performance metric in SAP systems. This message typically indicates that the SQL data cache hit rate is below an acceptable threshold, which can lead to performance issues in data retrieval operations.
  Cause:
  The SQL data cache hit rate measures the percentage of SQL queries that are served from the cache rather than requiring a new database access. 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 Query Variability: If the queries are highly variable and not repetitive, the cache may not be able to store relevant data effectively.
  Frequent Data Changes: If the underlying data changes frequently, the cache may be invalidated often, leading to a lower hit rate.
  Configuration Issues: Incorrect configuration settings for the SQL cache can lead to suboptimal performance.
  Increased Workload: A sudden increase in workload or user activity can lead to cache misses.
  
  Solution:
  To address the LVCALM031 error and improve the SQL data cache hit rate, consider the following solutions:
  
  Increase Cache Size: If possible, increase the size of the SQL data cache to accommodate more data.
  Optimize Queries: Review and optimize SQL queries to reduce variability and improve cache utilization.
  Adjust Configuration Settings: Check and adjust the configuration settings related to SQL caching in the SAP system.
  Monitor and Analyze: Use monitoring tools to analyze cache performance and identify patterns in data access that can inform adjustments.
  Regular Maintenance: Perform regular maintenance on the database to ensure optimal performance, including indexing and statistics updates.
  Review Data Model: Ensure that the data model is optimized for the types of queries being executed.
  
  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 SQL performance and caching for specific recommendations and patches.
  Performance Tuning: Consider engaging in performance tuning sessions to identify bottlenecks and optimize the overall system performance.
  Documentation: Refer to SAP documentation for best practices on SQL performance and caching strategies.
  
  By addressing the underlying causes and implementing the suggested solutions, you can improve the SQL data cache hit rate and enhance the performance of your SAP system.