How To Fix RT170 - Utilized area of entire device cache (percentage)

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 170

• Message text: Utilized area of entire device cache (percentage)

The device cache contains device definitions and server assignments for
all work processes. Entries are taken into the cache when they are
required. They can, however, also removed again, if there are no free
entries available.

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

INCLUDE BC_SPOOL_MOREINFO OBJECT DOKU ID TX LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RT170 - Utilized area of entire device cache (percentage) ?

  The SAP error message RT170, which indicates that the utilized area of the entire device cache has reached a certain percentage, typically relates to issues with the caching mechanism in SAP systems, particularly in the context of database performance and memory management.
  Cause:
  
  Cache Saturation: The device cache is full, meaning that the system has reached its limit for storing data in the cache. This can happen due to high data volume or inefficient cache management.
  High Workload: An increase in the number of transactions or data requests can lead to rapid cache utilization.
  Configuration Issues: Incorrect configuration settings for the cache size or parameters can lead to suboptimal cache performance.
  Data Access Patterns: If the data access patterns are not optimal, it can lead to frequent cache misses, causing the cache to fill up quickly.
  
  Solution:
  
  Increase Cache Size: If possible, increase the size of the device cache to accommodate more data. This can be done through the database configuration settings.
  Optimize Data Access: Review and optimize the data access patterns in your applications to reduce the load on the cache.
  Clear Cache: If the cache is not being utilized efficiently, consider clearing it to free up space. However, this should be done with caution as it may impact performance temporarily.
  Monitor Cache Usage: Implement monitoring tools to keep track of cache usage and performance metrics. This can help in identifying trends and potential issues before they become critical.
  Review Configuration: Check the configuration settings for the cache and adjust them as necessary to ensure optimal performance.
  Database Maintenance: Regularly perform database maintenance tasks, such as updating statistics and reorganizing indexes, to improve overall performance and reduce cache pressure.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to RT170 for specific guidance and recommendations from SAP support.
  Performance Tuning: Consider engaging in performance tuning activities for your SAP system, which may include analyzing workload, optimizing queries, and adjusting system parameters.
  Documentation: Refer to the official SAP documentation for your specific database and SAP version for detailed instructions on cache management and performance optimization.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with SAP support or a database administrator for further assistance.