Top Oracle GoldenGate Commands Every DBA Must Master

 GoldenGate is not just replication.

It’s real-time data movement with precision.
But most DBAs only scratch the surface.
If you’re serious about production-grade replication, these are the commands you must know inside GGSCI


1. INFO ALL
Your first diagnostic command.
GGSCI> INFO ALL
Shows status of Extract, Replicat, Manager.
Also gives checkpoint lag.
If lag increases, you investigate immediately.
This is your heartbeat monitor.


2. VIEW REPORT
When something fails, this is where truth lives.
GGSCI> VIEW REPORT EXT1
Gives detailed execution logs.
Error codes, trail issues, checkpoint problems.
Never guess. Always read report files.


3. STATS
Understand throughput and performance.
GGSCI> STATS EXTRACT EXT1
Shows number of operations processed.
Insert / Update / Delete counts.
Helps validate replication correctness during testing.


4. LAG
Real-time latency check.
GGSCI> LAG EXTRACT EXT1
or
GGSCI> LAG REPLICAT REP1
Critical in real-time systems (banking, telecom).
Even seconds matter.


5. START / STOP
Basic but dangerous if misused.
GGSCI> STOP EXTRACT EXT1
GGSCI> START EXTRACT EXT1
Always coordinate with downstream systems.
Stopping Extract blindly can cause backlog explosion.


6. ALTER EXTRACT / REPLICAT
Used for repositioning.
GGSCI> ALTER EXTRACT EXT1, BEGIN NOW
or
GGSCI> ALTER REPLICAT REP1, EXTSEQNO 15, EXTRBA 12345
Used during recovery scenarios.
Requires precision. One mistake = data inconsistency.


7. INFO DETAIL
Deep dive into process state.
GGSCI> INFO EXTRACT EXT1, DETAIL
Shows checkpoint, trail file, SCN position.
Essential during troubleshooting.


8. SEND Command
Real-time interaction with running process.
GGSCI> SEND EXTRACT EXT1 STATUS
No need to stop process.
Useful for live debugging.


9. LOGDUMP (Advanced)
Not GGSCI, but critical tool.
logdump> open ./dirdat/aa
Lets you read trail files.
This is where elite DBAs operate.


10. DELETE / ADD / REGISTER
Lifecycle management.
GGSCI> ADD EXTRACT EXT1, INTEGRATED TRANLOG
GGSCI> REGISTER EXTRACT EXT1 DATABASE
Especially important in integrated capture mode.


Quick Takeaway / Summary
GoldenGate is simple… until it breaks.
These commands are not optional—they’re survival tools.
Master them, and you control replication.
Ignore them, and replication controls you.