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GNW05 – Extending Databases With the Full Power of Hadoop: How Gluent Does It

It’s time to announce the next webinar in the Gluent New World series. This time I will deliver it myself (and let’s have some fun :-)

Details below:

GNW05 – Extending Databases With the Full Power of Hadoop: How Gluent Does It

Index Compression

Richard Foote has published a couple of articles in the last few days on the new (licensed under the advanced compression option) compression mechanism in 12.2 for index leaf blocks. The second of these pointed out that the new “high compression” mechanism was even able to compress single-column unique indexes – a detail that doesn’t make sense and isn’t allowed for the older style “leading edge deduplication” mechanism for index compression.

Oracle User Groups and the (Lack of) Support from Oracle

UPDATE-  I want to thank everyone who supported this post and reached out to me about the challenges of managing and working with user group events.  This post, as with other’s I’ve written on different topics, (I have quite the knack to say what most just think, don’t I?

Extended Stats

After my Masterclass on indexes at the UKOUG Tech2016 conference this morning I got into a conversation about creating extended stats on a table. I had pointed out in the masterclass that each time you dropped an index you really ought to be prepared to create a set of extended stats (specifically a column group) on the list of columns that had defined the index just in case the optimizer had been using the distinct_keys statistic from the index to help it calculate cardinalities.

Gluent Podcast with Mark Rittman

Mark Rittman has been publishing his podcast series (Drill to Detail) for a while now and I sat down with him at UKOUG Tech 2016 conference to discuss Gluent and its place in the new world with him.

This podcast episode is about 49 minutes and it explains the reasons why I decided to go on to build Gluent a couple of years ago and where I see the enterprise data world going in the future.

It’s worth listening to, if you are interested in what we are up to at Gluent and hear Mark’s excellent comments about what he sees going on in the modern enterprise world too!

 

Histogram Upgrade

I’ve written notes in the past about the improvements 12c introduces for histograms – particularly the frequency and top-N histograms which can be generated “free of charge” while the basic “approximate NDV” scans are taking place to gather stats. Gathering histograms in 12c is much safer than it used to be in earlier versions of Oracle even in the case of the new hybrid histograms (which are still sampled on a very small sample and therefore still a stability risk).

Do you suffer from Storage Stockholm Syndrome?

The last year at DSSD (now a part of Dell EMC) has been an extremely interesting one for me, and I’ve learned a great deal, which is always good. Some of the lessons have been surprising, though… One of them is what I will rather dramatically refer to as Storage Stockholm Syndrome. Stockholm Syndrome is … Continue reading "Do you suffer from Storage Stockholm Syndrome?"

Do you suffer from Storage Stockholm Syndrome?

The last year at DSSD (now a part of Dell EMC) has been an extremely interesting one for me, and I’ve learned a great deal, which is always good. Some of the lessons have been surprising, though… One of them is what I will rather dramatically refer to as Storage Stockholm Syndrome. Stockholm Syndrome is … Continue reading "Do you suffer from Storage Stockholm Syndrome?"

Do you suffer from Storage Stockholm Syndrome?

The last year at DSSD (now a part of Dell EMC) has been an extremely interesting one for me, and I’ve learned a great deal, which is always good. Some of the lessons have been surprising, though… One of them is what I will rather dramatically refer to as Storage Stockholm Syndrome. Stockholm Syndrome is … Continue reading "Do you suffer from Storage Stockholm Syndrome?"