Histograms on character strings between 11.2.0.3 and 11.2.0.4
In short, when have statistics gathered in 11.2.0.3 but the query is now running with the 11.2.0.4 optimizer, you may have wrong cardinality estimation on histograms, leading to sub-optimal plans. I...
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Can I do it with PostgreSQL? – 6 – Server programming
Today we’ll continue this series with another topic: What does PostgreSQL provide when it comes to server programming, that is: Writing functions and triggers to support your application? In Oracle you...
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UKOUG Super Sunday
Today at the UKOUG Super Sunday in Birmingham, I had the opportunity to assist at interesting conferences. The first presentation was about Oracle RAC internals and its new features in version...
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Multitenant internals – Summary
Today at UKOUG TECH16 conference I’m presenting the internals of the new multitenant architecture: 12c Multitenant: Not a Revolution, Just an Evolution. My goal is to show how it works, that metadata...
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UKOUG – Tech16 – Super Sunday
This year, I had the opportunity to attend the UKOUG 2016 which took place in Birmingham. This event normally begin on Monday but each year, there is a complimentary afternoon with high technical...
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UKOUG 2016 Day 2
Today I assisted at a first session about one of my favorite tool: Upgrade to EM 13c now. The session was presented by Phil Gric from Red Stack Tech. At the begining he described us the most common...
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SQL Server 2016: distributed availability groups and cascaded replicas
During the last MVP summit, we had some interesting discussions about availability groups with the SQL Server team and I remember someone asked for managing scenarios like Oracle cascaded destinations...
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UKOUG 2016 – Second day
This second day at UKOUG was quite good. I slept well at the Jurys Inn hotel and this morning, I enjoyed one more time a real English breakfast with beans, bacons, eggs and sausages. I like that to be...
View ArticleFrom MySQL (Oracle) to Postgres using the EDB Migration Toolkit
Why should you migrate? If your current MySQL database does not offer some needed functionnalities according to your business as: – more security – more high availibilty options (hot standby) – Strong...
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UKOUG 2016 DAY 3
Today at UKOUG 2016, the Cloud has won against the sun :=) The first sesssion I attended this morning was animated by Kamil Stawiarski from ORA 600 company: Securing the database againt Unauthorized...
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UKOUG 2016 – Third day
Today, it’s the third day in Birmingham for the UKOUG Tech16 event. We had a good time yesterday evening in English pubs. Today, I attended several sessions today. Sessions that I was mostly...
View ArticleOEL 7 – How to disable IPv6 on Oracle Linux 7
In case you are not interested in IPv6, you can use the following HowTo to disable it on Oracle Linux 7. Unless you have something very very special on your System, these 10 Steps should do it. First...
View ArticleOracle 12cR2: Statistics Advisor
Today at #ukoug_tech16 12:30 in hall 11A I’ll talk about Statistics Gathering Best Practice & 12cR2 Statistics Advisor Rather than taking the Optimizer Statistics Advisor rules one by one I’ll show...
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UKOUG 2016 DAY 4
Today is the last day at UKOUG in Birmingham; the first session I attended this morning was presented by Julian Dyke about installing and upgrading Oracle 12c release 2 Grid infrastructure and RAC. He...
View ArticleOEL 7 – Project Quotas on Oracle Homes with XFS on Oracle Linux 7
User and group quotas do exist for quite a while for all kind of file systems, like ext4 or vxfs and maybe many others. However, for my use case, I do need quotas for different directories on the same...
View ArticleCan I do it with PostgreSQL? – 7 – Partitioning
PostgreSQL supports tables up to 32TB. Do you want to be the one responsible for managing such a table? I guess not. Usually you start to partition your tables when they grow very fast and consume more...
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Installing PostgreSQL 9.6.1 with EnterpriseDB Installer
As you may know PostgreSQL 9.6 was released a few months ago. And EnterpriseDB (EDB) offers a package installer for installing the community version. This EDB package can be downloaded here. In this...
View ArticleEnterpriseDB Backup and Recovery Tool (BART)
Many tools are proposed for backup and recovery operation of a PostgreSQL database. EnterpriseDB has developed a product named BART (Backup and Recovery Tool). Use of this product needs a subscription...
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Oracle 12c – RMAN and Unified Auditing – Does it really work?
The new Oracle Unified Auditing feature, audits RMAN operation per default as soon as you relink your Oracle binary and start your instance. A quite cool new feature, because it allows me to audit RMAN...
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Live from SQL Saturday Slovenia 2016!
After a little trip, just 1-hour flying from Zürich to Ljubljana yesterday, the SQL Saturday Slovenia 2016 begins this morning at the Faculty of Computer and Information Science of the University of...
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