Tag: exadata

Favorite Way: Migrating to Exadata

There are lots of considerations to be taken into account when migrating databases to the Exadata. It’s like any other migration. DBAs and other stakeholders of the system have to evaluate what to migrate and what not to, physical and…

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Exadata X5 – A Practical Point of View of the New Hardware and Licensing

Oracle recently announced its latest iteration of Exadata – X5-2. It includes a refresh of the hardware to the most recent Xeon® E5-2699 v3 CPUs. These new CPUs boost the total cores count in a full rack to 288. This…

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OLTP type 64 compression and ‘enq: TX – allocate ITL entry’ on Exadata

Recently we’ve seen a strange problem with the deadlocks at the client database on Exadata, Oracle version 11.2.0.4 . Wait events analysis showed that sessions were waiting for “enq: TX – allocate ITL entry” event. It was strange because there…

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How to Troubleshoot OEM 12c Cloud Control Auto-Discovery

OEM 12c Cloud Control looks daily for new targets, placing them in a queue for admin promotion to managed objects. Details and troubleshooting info follow.

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OEM12c Discovery of Exadata Cluster

In this post I provide a step-by-step guide outlining how to generate databasemachine.xml file to be used with OEM 12c.

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