How To Fix ICM607 - Small hit ratio in ICM memory cache

SAP Error Message - Details

• Message type: E = Error

• Message class: ICM - Messages for ICM Monitor

• Message number: 607

• Message text: Small hit ratio in ICM memory cache

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 ICM607 - Small hit ratio in ICM memory cache ?

  The SAP error message ICM607 indicates that there is a small hit ratio in the Internet Communication Manager (ICM) memory cache. This typically means that the cache is not being utilized effectively, leading to performance issues. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause
  
  Insufficient Cache Size: The cache may be too small to hold frequently accessed data, leading to a high number of cache misses.
  Inefficient Caching Strategy: The configuration of the caching mechanism may not be optimal for the workload or the types of requests being processed.
  High Volume of Unique Requests: If the application is serving a large number of unique requests, the cache may not be able to store enough data to be effective.
  Configuration Issues: Incorrect settings in the ICM configuration can lead to poor cache performance.
  
  Solutions
  
  
  Increase Cache Size: 
  
  You can increase the size of the ICM memory cache. This can be done by adjusting the parameters in the ICM configuration. Look for parameters like icm/HTTP/max_cache_size and increase the value.
  
  
  
  Optimize Caching Strategy:
  
  Review the caching strategy and ensure that it aligns with the application’s usage patterns. This may involve adjusting the cache expiration settings or the types of data being cached.
  
  
  
  Monitor and Analyze Traffic:
  
  Use monitoring tools to analyze the traffic patterns and identify which requests are causing cache misses. This can help in understanding whether the cache is being used effectively.
  
  
  
  Adjust ICM Parameters:
  
  Review and adjust other relevant ICM parameters, such as icm/HTTP/keep_alive_timeout, icm/HTTP/keep_alive, and icm/HTTP/timeout, to ensure optimal performance.
  
  
  
  Regular Maintenance:
  
  Regularly clear the cache if it is filled with stale or infrequently accessed data. This can help in maintaining a higher hit ratio.
  
  
  
  Related Information
  
  ICM Configuration: The ICM can be configured through transaction RZ10 or RZ11 in the SAP GUI. You can also check the ICM settings in the instance profile.
  Monitoring Tools: Use transaction SMICM to monitor the ICM and view cache statistics. This can provide insights into cache performance and hit ratios.
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to ICM performance issues.
  Performance Tuning: Consider engaging in broader performance tuning activities for your SAP system, which may include database tuning, application optimization, and server resource allocation.
  
  By addressing the underlying causes and implementing the suggested solutions, you can improve the hit ratio in the ICM memory cache and enhance the overall performance of your SAP system.