How To Fix CNV_DMC_HC049 - &1 - &2: Median latency (&3) has exceeded warning threshold by &4

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_HC -

• Message number: 049

• Message text: &1 - &2: Median latency (&3) has exceeded warning threshold by &4

What causes this issue?

SAP Landscape Transformation Replication Server calculates the time
between the recording of a change in the source system and sending this
data to the target. The respective threshold has been exceeded.

System Response

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

How to fix this error?

Many different elements influence latency. It is always a good idea with
starting to monitor the latency values over some time. You can view
historical latency information in transaction LTRC. On the tab
<ZK>Expert Functions</>, choose <ZK>Display Replication Statistics</>.
If there are consistently high latency values, there may be issues with
the connections to the source or target systems, or issues within the
operations executed in these systems.
If you see different latency values (maybe aligned your business hours),
it is likely that the amount of changes in the source system is higher
than what SAP Landscape Transformation Replication Server can transfer
with one job. If this is the case, options for improving latency include
filtering the data, or specifying ranges for the logging table (for more
information, see <ZK>Performance Options</> in transaction LTRS).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_HC049 - &1 - &2: Median latency (&3) has exceeded warning threshold by &4 ?

  The SAP error message CNV_DMC_HC049 indicates that the median latency for a specific operation has exceeded a predefined warning threshold. This message is typically related to data migration or data transfer processes within SAP systems, particularly when using the Data Migration Cockpit or similar tools.
  Cause:
  
  
  High Latency: The median latency of data processing has exceeded the acceptable limits. This could be due to various factors such as:
  
  Network issues causing delays in data transfer.
  Resource contention on the server (CPU, memory, I/O).
  Inefficient data processing logic or queries.
  Large volumes of data being processed at once.
  
  
  
  Configuration Issues: The system may not be optimally configured for the data migration task, leading to performance bottlenecks.
  
  
  External Factors: Other processes running on the system may be consuming resources, impacting the performance of the data migration.
  
  
  Solution:
  
  
  Monitor System Performance: Use monitoring tools to check the performance of the SAP system and the underlying infrastructure. Look for CPU, memory, and I/O usage.
  
  
  Optimize Data Migration Process:
  
  Break down large data migration tasks into smaller batches to reduce latency.
  Review and optimize any custom logic or queries involved in the data migration.
  
  
  
  Network Optimization: Ensure that the network connection is stable and has sufficient bandwidth for the data transfer.
  
  
  Adjust Configuration: Review the configuration settings for the data migration process. Adjust parameters related to batch sizes, commit intervals, and other relevant settings to improve performance.
  
  
  Check for Resource Contention: Identify and resolve any other processes that may be consuming excessive resources on the server.
  
  
  Increase Warning Threshold: If the current threshold is too low for your specific environment, consider increasing it, but this should be done with caution and after thorough analysis.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error message.
  Documentation: Review the official SAP documentation for the Data Migration Cockpit or the specific tool you are using to understand best practices and performance tuning tips.
  Community Forums: Engage with the SAP community forums or support channels to see if others have encountered similar issues and what solutions they have implemented.
  
  By addressing the underlying causes and optimizing the data migration process, you should be able to resolve the CNV_DMC_HC049 error and improve the performance of your data migration tasks.