Category Archives: Statistics

Automatic Collection of Fixed Objects Statistics in 12c

In my previous life as the Optimizer Lady, I wrote a blog on the importance of gathering fixed object statistics, since they were not originally gathered as part of the automatic statistics gather task. Starting with Oracle Database 12c Release … Continue reading

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Should you gather System Statistics?

While at the HotSOS Symposium, last month, I caused quite a stir when I recommended that folks should never gather system statistics. Why such a stir? It turns out this goes against what we recommend in the Oracle SQL Tuning … Continue reading

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Optimizer Histograms

At the recent OUG Ireland conference I had the privilege of participating in a panel discussion on the Oracle Database. During the course of the session the topic of Optimizer histograms came up. As always, a heated discussion ensued among … Continue reading

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