Category Archives: RAC

Automatic Failback of a Service in a Oracle-19c-RAC-Database

High-availability of database services has been a feature of Oracle Real Application Servers since many versions. Bascially, when a database instance fails, a service which has got this instance as a preferred instance, fails over to another available instance. Unfortunately, … Continue reading

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OUGN Spring Seminar 2018: Presentation “Domain Services Cluster”

Thanks to everyone, who attended my presentation on “The 3 investigators” (OraChk, TFA and DBSAT) at the OUGN Spring Seminar 2018 on “MS Color Fantasy“. Here you can find the presentation.

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Oracle Grid Infrastructure: change the interval for the Cluster Verification Utility (ora.cvu)

Since Oracle 11.2.02. Oracle has integrated the Cluster Verification Utility (CVU) as a cluster resource. It‘s invoked every 6 hours and checks the health of your cluster. If you think, this is too often, you can change the interval. I‘ll … Continue reading

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Patching Oracle 12.2 Grid Infrastructure before setting up a cluster

One of the first steps after setting up an Oracle cluster is patching the Grid Infrastructure to the most current patchlevel. Usually this has to be done on all cluster nodes separately and requires some time and effort. But what … Continue reading

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Oracle Restart not deprecated anymore

Oracle Restart ist the Clusterware for single instance systems. You can use it to run a single instance system with (almost) the same commands as a cluster. For example, Oracle Restart takes over Starting and stopping of listeners and database … Continue reading

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