How To Fix DB6523 - Statement cache monitoring

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6 - DB6: Alert Monitoring and Alert Configuration

• Message number: 523

• Message text: Statement cache monitoring

Copy of DB6 511 except for user entry

What causes this issue?

To allow meaningful monitoring of the database, you must activate this
switch.

System Response

If this switch is not set, it can lead to problems ranging from
restricting the function of the CCMS transactions to erroneous
terminations.

How to fix this error?

Activate the switch by setting the appropriate database manager
parameters using the following command:
<LB>UPDATE DBM CFG USING DFT_MON_STMT ON </>
The setting will become active at the next connection to the database.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DB6523 - Statement cache monitoring ?

  The SAP error message DB6523 relates to statement cache monitoring in the context of database performance. This message typically indicates that there is an issue with the statement cache, which is used to store SQL statements for reuse, thereby improving performance by reducing the need to parse and compile SQL statements repeatedly.
  Cause:
  
  Cache Size Limitations: The statement cache may be full or not sized appropriately for the workload, leading to performance degradation.
  High Turnover of Statements: If there are many unique SQL statements being executed, the cache may not be able to retain frequently used statements, causing cache misses.
  Database Configuration: The database settings may not be optimized for the specific workload, leading to inefficient use of the statement cache.
  Application Behavior: The way the application generates SQL statements can lead to excessive cache turnover, such as using dynamic SQL without parameterization.
  
  Solution:
  
  Increase Cache Size: If the statement cache is too small, consider increasing its size in the database configuration settings.
  Optimize SQL Statements: Review and optimize the SQL statements being executed to reduce the number of unique statements and improve reuse.
  Parameterization: Use parameterized queries instead of dynamic SQL to help the database reuse execution plans.
  Monitor and Analyze: Use database monitoring tools to analyze statement cache usage and identify patterns or specific statements that are causing issues.
  Database Tuning: Perform database tuning to optimize performance, which may include adjusting other related parameters beyond just the statement cache.
  
  Related Information:
  
  Database Documentation: Refer to the specific database documentation (e.g., SAP HANA, Oracle, SQL Server) for detailed instructions on configuring and monitoring the statement cache.
  SAP Notes: Check SAP Notes for any known issues or patches related to the DB6523 error message.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools (like ST04 for database performance) to get insights into SQL execution and cache usage.
  Consulting SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it impacts critical business processes.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the impact of the DB6523 error and improve overall database performance.