How To Fix CNV_DMC_HC065 - &1 - &2: Average latency (&3) has exceeded warning threshold by &4

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_HC -

• Message number: 065

• Message text: &1 - &2: Average 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_HC065 - &1 - &2: Average latency (&3) has exceeded warning threshold by &4 ?

  The SAP error message CNV_DMC_HC065 indicates that the average latency for a data transfer process has exceeded a predefined warning threshold. This message is typically encountered during data migration or data transfer activities, particularly when using the SAP Data Migration Cockpit or similar tools.
  Cause:
  
  
  High Latency: The average latency of data transfer operations has surpassed the acceptable limit. This can occur due to various reasons, such as:
  
  Network issues causing delays in data transmission.
  Resource contention on the source or target systems (e.g., CPU, memory, or I/O bottlenecks).
  Inefficient data processing or transformation logic.
  Large volumes of data being processed at once, leading to slower performance.
  
  
  
  Configuration Issues: Incorrect configuration settings for the data transfer process can also lead to increased latency.
  
  
  Solution:
  
  
  Monitor System Performance: Check the performance metrics of both the source and target systems. Look for any resource bottlenecks (CPU, memory, disk I/O) that could be affecting performance.
  
  
  Network Analysis: Investigate the network connection between the source and target systems. Ensure that there are no issues such as high latency, packet loss, or bandwidth limitations.
  
  
  Optimize Data Transfer:
  
  If possible, break down large data transfers into smaller batches to reduce the load on the system.
  Review and optimize any data transformation logic to ensure it is efficient.
  
  
  
  Adjust Configuration Settings: Review the configuration settings for the data migration process. You may need to adjust parameters related to batch sizes, commit intervals, or other relevant settings.
  
  
  Increase Resources: If the source or target system is under heavy load, consider increasing the resources (CPU, memory) allocated to these systems.
  
  
  Check Logs: Review the logs for any additional error messages or warnings that could provide more context about the issue.
  
  
  Consult Documentation: Refer to SAP documentation or support notes related to the specific data migration tool you are using for any additional troubleshooting steps or recommendations.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error message or provide guidance on performance tuning for data migration.
  Performance Tuning Guides: SAP provides various performance tuning guides that can help optimize data transfer processes.
  Community Forums: Engage with the SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the latency issue and implement appropriate solutions to mitigate it.