Monthly Archive: June 2011

Jun 13

Explain Plan Cost Pain Point

Earlier today, I was working with a developer on a query that had poor performance. This query was large and complex, and initially it looked like a daunting effort to find out where the performance problem lies. With Explain Plan we can sometimes use the cost to help narrow down the performance pain point of …

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Jun 07

KGXGN polling error (15)

When trying to start the second instance in a two-node RAC cluster, the second instance will not start. If the instance on node1 is running, the instance on node2 will not start. If the instance on node2 is running, the instance on node1 will not start. The Alert Log shows the following: Error: KGXGN polling …

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