- The process hasn't processed any record yet
- The source system's clock is ahead of the target system's clock due to the clock imperfections or timezone differences.
When performing remote capture/delivery, it's recommended that Oracle GoldenGate's operating system (OS) clock is synchronized with the database clock and is within the same timezone.
To show the correct lag time, you can change the time and timezone setup on the Oracle GoldenGate side. The following is an example to change the time zone GGCS virtual machine timezone to UTC:
Use lag extract, instead of info extract, get the lag time more precisely, because it directly communicates with extract to obtain the lag time rather than reading the checkpoint position in the trail.