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Oracle Data Guard 11gR2 Administration Beginner's Guide by Nassyam Basha, Emre Baransel

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Time for action – checking the redo transport service status

The following steps can be performed to check the redo transport service status:

  1. The first query to be executed to be sure that the redo transport service is working properly will be the V$DATAGUARD_STATS view.
    SQL> SELECT NAME, VALUE, TIME_COMPUTED FROM V$DATAGUARD_STATS WHERE NAME='TRANSPORT LAG';
    
    NAME                   VALUE                TIME_COMPUTED
    ---------------------- -------------------- ----------------------
    transport lag          +00 00:00:00         08/27/2012 18:06:30

    The TIME_COMPUTED value has to be up-to-date. We can see that there is no redo transport lag in our logical standby configuration. We'll see a time value if there is a problem with the redo transport. Also, if there is an excessive redo generation on the ...

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