Oracle 12.1.0.2
RHEL7
To begin with, I have not worked much at all with standby databases, so my
knowledge is somewhat lacking.
For business reasons, we have a primary database with two physical
standbys. Everything is configured in dgmgrl and enabled. Monitoring with
EM13c is reporting the lag times, so all looks good for basic setup and
monitoring. We seem to have significant lag at times on one of the
standbys, as much as 20 minutes. When looking at v$managed_standby, we see
the status as "WAIT_FOR_LOG". The other standby never seems to be more
that a few seconds behind, if at all, and the status is "APPLYING_LOG".
Is this normal? I've been researching, but haven't found an answer yet. I
didn't create or start the standby databases, so I don't have any idea what
was actually done that could be causing this behavior. Any suggestions
would be appreciated.
Thank you,
--
Sandy B.
