How To Fix CNV_DMC_HC064 - &1 - &2: Minimum latency (&3) has exceeded error threshold by &4

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_HC -

• Message number: 064

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

What causes this issue?

SAP Landscape Transformation Replication Server calculates the time
difference 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_HC064 - &1 - &2: Minimum latency (&3) has exceeded error threshold by &4 ?

  The SAP error message CNV_DMC_HC064 typically relates to data migration processes, particularly in the context of SAP Data Migration Cockpit (DMC) or SAP S/4HANA migrations. This error indicates that the minimum latency for a data transfer operation has exceeded a predefined error threshold, which can lead to performance issues or data integrity concerns during the migration process.
  Cause:
  
  Latency Issues: The error suggests that the time taken for data transfer (latency) has exceeded the acceptable limits. This can happen due to network issues, server performance problems, or inefficient data processing.
  Resource Constraints: Insufficient system resources (CPU, memory, I/O) on the source or target systems can lead to increased latency.
  Data Volume: Large volumes of data being processed simultaneously can also contribute to latency issues.
  Configuration Settings: Incorrect configuration settings in the migration tools or the underlying database can lead to performance bottlenecks.
  
  Solution:
  
  Monitor System Performance: Use monitoring tools to check the performance of both the source and target systems. Look for CPU, memory, and I/O bottlenecks.
  Network Optimization: Ensure that the network connection between the source and target systems is stable and has sufficient bandwidth. Consider optimizing network settings or using a dedicated connection for data migration.
  Adjust Migration Parameters: Review and adjust the parameters related to data migration in the DMC. This may include batch sizes, commit intervals, or other settings that can impact performance.
  Data Volume Management: If possible, break down the data migration into smaller batches to reduce the load on the system and minimize latency.
  Check Logs and Traces: Review the logs and traces generated during the migration process to identify specific issues or errors that may be contributing to the latency.
  Consult SAP Notes: Check for any relevant SAP Notes or updates that may address known issues related to this error message.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the Data Migration Cockpit and related tools for best practices and troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Performance Tuning: Consider general performance tuning practices for SAP systems, including database optimization and system configuration adjustments.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.