Qlik Replicate Source latency
Source latency is high, typically indicates that the changes made in the source database are taking a significant amount of time to be reflected in the replicated data at the target. Source latency represents the delay between a change occurring in the source database and the corresponding update being applied to the target.
Here are some possible reasons for a high source latency:
- High Volume of Changes:
- If there is a high volume of changes happening in the source database, the replication process may struggle to keep up, leading to an increased latency.
- Network Issues:
- Slow or unreliable network connectivity between the source and target databases can contribute to increased latency.
- Resource Bottlenecks:
- Resource constraints on either the source or target systems, such as limited processing power, memory, or disk I/O, can impact the replication speed.
- Replication Tool Configuration:
- Check the configuration settings of your replication tool (in this case, Qlik Replicate) to ensure it is optimized for performance.
- Long Transactions:
- If there are long-running transactions in the source database, it might delay the availability of changes for replication.
- Issues with Change Data Capture (CDC):
- If the change data capture mechanisms are not working correctly or efficiently, it can lead to delays in identifying and capturing changes.
- Maintenance or Backup Activities:
- If there are ongoing maintenance activities, backups, or other tasks that affect the source database, it can impact the replication process.
To address the issue:
- Review the logs and monitoring information provided by Qlik Replicate to identify any errors or warnings.
- Check the network connectivity and system resources on both the source and target sides.
- Ensure that the replication tool’s configuration aligns with best practices for your specific use case.
- Investigate the source database for any long-running transactions or issues affecting the change data capture process.