Category Archives: RAC

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 of your cluster. If you think, this is too often, you can change the interval. I‘ll show you … 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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Which node is the OCR master node (AKA “OCR writer”) in a RAC?

There are several ways to answer this question: Look for “OCR master” in the log files of crsd and check olsnodes for the node ID Check which node did the most recent automatic OCR backup

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Oracle 12c: Changed parameter naming for “srvctl”

Over time, “srvctl” became a really powerful for the administration of resources of an Oracle cluster. Oracle added new components and options in every new version of the Grid Infrastructure software. With Oracle 12.1.0.2, “srvctl -help” lists 266 options for … Continue reading

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