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Index Compression Part VI: 12c Index Advanced Compression Block Dumps (Tumble...
Sometimes, a few pictures (or in this case index block dumps) is better than a whole bunch of words :) In my previous post, I introduced the new Advanced Index Compression feature, whereby Oracle...
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Index Advanced Compression vs. Bitmap Indexes (Candidate)
A good question from Robert Thorneycroft I thought warranted its own post. He asked: “I have a question regarding bitmapped indexes verses index compression. In your previous blog titled ‘So What Is A...
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Index Advanced Compression: Multi-Column Index Part I (There There)
I’ve discussed Index Advanced Compression here a number of times previously. It’s the really cool additional capability introduced to the Advanced Compression Option with 12.1.0.2, that not only makes...
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Index Advanced Compression: Multi-Column Index Part II (Blow Out)
I previously discussed how Index Advanced Compression can automatically determine not only the correct number of columns to compress, but also the correct number of columns to compress within specific...
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12.2 Index Advanced Compression “High” – Part I (High Hopes)
Oracle first introduced Advanced Compression for Indexes in 12.1 as I’ve discussed here a number of times. With Oracle Database 12c Release 2, you can now use Index Advanced Compression “High” to...
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12.2 Index Advanced Compression “High” Part II (One Of My Turns)
In Part I, I introduced the new Index Advanced Compression default value of “HIGH”, which has the potential to significantly compress indexes much more than previously possible. This is due to new...
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12.2 Index Advanced Compression “High” Part III (I Can’t Give Everything Away)
If you like the look of the new Index Advanced Compression setting of “High” available with Oracle Database 12c Release 2 as I’ve discussed previously in Part I and Part II, well there’s a way to make...
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12.2 Index Advanced Compression “High” Part IV (The Width of a Circle)
A quick post (for me) with a long weekend beckoning… In Part I, Part II and Part III of looking at the new Index Advanced Compression level of “High”, we discussed how it can significantly decrease the...
View ArticleBitmap Index On Column With 212552698 Distinct Values, What Gives? (I’d...
In my previous post on Indexing The Autonomous Warehouse, I highlighted how it might be necessary to create indexes to improve the performance and scalability of highly selective queries, as it might...
View ArticleOracle Database 19c Automatic Indexing: Index Compression (Ghosteen)
In my previous post on Automatic Indexing, I discussed how the default index column order (in absence of other factors) is column id, the order in which the columns are defined in the table. In...
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