Variations on 1M rows insert (4): IN MEMORY
Oracle In-Memory option is for reporting. Oracle has chosen an hybrid approach: maintain the In-Memory Column Store in addition of the buffer cache. Dont' forget our In-Memory event, but for the...
View ArticleOptimized Row Columnar (ORC) format in PostgreSQL
Nowadays everybody is talking about columnar storage format. What can PostgreSQL do in this area? There is no native support for that in PostgreSQL but thanks to the fact that PostgreSQL is highly...
View ArticleVariations on 1M rows insert (5): using 'perf'
In previous post I explained that I've observed a 2x CPU usage when running my insert test case in 11.2.0.4 vs. 11.2.0.2 I discussed that with @martinberx @OracleSK @TanelPoder @xtner @Ycolin...
View ArticleVariations on 1M rows insert (6): CPU Flame Graph
If you followed the 1M rows insert variations, you have seen how something simple brought me into an investigation with the latest tools available to see where the time is spent. When the time is CPU...
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Sharepoint and Nintex Workflow: automate your Business Processes
What is a WORKFLOW? A workflow is the representation of an operation sequence, declared as work of a person or group, an organization of staff, or one or more simple or complex mechanisms. These...
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Variations on 1M rows insert (3): using SQL Server In-Memory features
Let’s continue with this series about inserting 1M rows and let’s perform the same test with a new variation by using SQL Server In-Memory features. For this blog post, I will still use a minimal...
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SQL Saturday Lisbon: from Francesinha to Bacalhau
The last week-end, I was at the SQL Saturday 369 that held in Lisbon. If you take a look at the agenda, you'll probably see that there is a lot of interesting sessions with a lot of famous speakers....
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SQL Server 2014: First Service Pack (SP1) is available
May 14th, Microsoft has released the first Service Pack (SP1) for SQL Server 2014. It is more than thirteen months after the RTM version.SQL Server 2014 Service Pack 1 includes all of the CU from 1 to...
View ArticleList all RMAN backups that are needed to recover
This blog post is something I had in draft and Laurent Schneider blog post reminds me to publish it. With the right RMAN configuration you should not have to managed backup files yourself. The RMAN...
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Row Store vs Column Store in SAP HANA
The SAP HANA database allows you to create your tables in Row or Column Store mode. In this blog, I will demonstrate that each method has its advantages and disadvantages and should be used for...
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Alfresco: video thumbnails and transformations
Alfresco support, by default, the preview in your browser of some video formats like mp4 but doesn't support some others like mkv, avi or wmv. Even if Google Chrome can read mkv files for example, if...
View Articlewhat that in-memory term is about, and what not
Everybody is talking about in-memory databases these days. And everybody is talking about columnar store for sets of data because this can be a benefit for analytic queries. And a lot of people start...
View ArticleDBA_SQL_PLAN_DIRECTIVE.LAST_USED
If you have read Matching SQL Plan Directives and queries using it then you know how to use the '+metrics' format of dbms_xplan. 21:49:54 SQL> explain plan for select distinct * from DEMO_TABLE...
View ArticleHow to import SQL Plan Directives
Today I've presented SQL Plan Directives at the SOUG Romandie event. I had a question about the import/export of directives by Data Pump. The idea is that a lot of testing has been done on QA in order...
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A SharePoint - Business Analyst? What for?
Business analysis is becoming a widely accepted and valued position in organizations today, particularly those that are looking for new ways to enhance information systems.Good business analysis allows...
View Article12c Dynamic Sampling and Standard Edition
12c is coming with more dynamic sampling, now called dynamic statistics and using the new Adaptive Dynamic Sampling algorithm. The goal is to have better estimations and better estimations gives better...
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Because SharePoint 2013 has also limitations!
WHAT IS? Boundaries: are Static limits that cannot be exceeded by design. An example of a boundary is the 2 GB document size limit. Thresholds: are configurable limits that can be exceeded to...
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SQL Server 2016 CTP2 is out!
As announced by Satya Nadella at the Microsoft Ignite keynote in Chicago, SQL Server 2016 CTP2 is finally out and it follows a previous private CTP. This CTP will provide some interesting features to...
View Articletesting postgresql development snapshots
If you want to test some of the features that will be coming with the next postgresql release even before an official beta version is released you can use the daily development snapshot .
View ArticleConvert a snapshot standby to a new database
A snapshot standby database is a nice solution when you want a temporary copy of the primary where you can do whatever you want (test a bug fix for example) and then convert it back to physical...
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