v-dgmon: Lightweight Oracle Data Guard Monitor

Monitoring the synchronization lag of Oracle Data Guard is critical for Disaster Recovery (DR). v-dgmon provides a silent, reliable way to track Transport and Apply lags without any external dependencies.

Key Features

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• Native Connectivity: No Oracle Client/OCI required. Pure Go implementation for maximum portability.
• Legacy Compatibility: Gracefully handles password expiry warnings (ORA-28002) and older Oracle versions.
• Time Conversion: Automatically parses Oracle interval strings into pure seconds for easier analysis.
• CSV Archiving: Appends metrics to CSV files, enabling long-term trend visualization in Excel or Grafana.
• Graceful Shutdown: Handles OS signals for safe exit without corrupting logs.

Usage

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1. Edit config.json with your connection strings.
2. Run v-dgmon.exe.
3. Check the generated .csv files for sync history.

⬇️ Download v-dgmon.zip

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