Error
Error Code: ORA-16855

Oracle ORA-16855: Transport Lag Exceeded

📦 Oracle Database
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Description

This error indicates that the redo transport lag between the primary and standby database has exceeded the configured threshold. This usually occurs due to network issues or performance bottlenecks affecting redo log transfer.
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Error Message

ORA-16855: transport lag has exceeded specified threshold
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Known Causes

4 known causes
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Network Latency
High network latency between the primary and standby databases slows down redo log transfer, leading to lag.🌐
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Network Disconnection
A complete network outage prevents redo logs from being transferred, quickly exceeding the transport lag threshold.💻
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Insufficient Bandwidth
Limited bandwidth on the network connection can bottleneck redo log transfer, resulting in a significant lag.⚙
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Standby Database Bottleneck
The standby database may be unable to keep up with applying the redo logs, contributing to increased transport lag.⚙
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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

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