How to add a DELAY in applying transactions in GoldenGate?

APPLIES TO:

GOAL

How to add a DELAY in the application of transactions when using Oracle GoldenGate?
 

SOLUTION

The following are the options available for delaying the application of transactions on the target.

 
Option 1: ( Recommended )

You could use the DEFERAPPLYINTERVAL parameter to to set an amount of time that Replicat waits before applying captured transactions to the target database.

Default 0 (no delay)

Syntax [DEFERAPPLYINTERVAL <n><unit>]

<n> is a numeric value for the amount of time to
delay. Minimum is set by the EOFDELAY parameter.
Maximum is seven days.

<unit> can be:
S | SEC | SECS | SECOND | SECONDS | MIN | MINS | MINUTE | MINUTES | HOUR | HOURS | DAY | DAYS

This example directs Replicat to wait 2 hours before posting its transactions.

DEFERAPPLYINTERVAL 2HOURS

Option 2:

You can also look at the use of EOFDELAY in the replicat. When the replicat positions to trail EOF, then you could have the replicat wait for 600 seconds or 10 minutes before doing more work. 

This example directs Replicat to wait 600 seconds when the replicate positions to the trail EOF.

EOFDELAY 600


The eofdelay suspends the replicat checking the trail. While DEFERAPPLYINTERVAL causes the replicat to suspend applying the data read from the trail. So former introduces the delay in reading while latter introduces the delay while applying.