Database management

What 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 mixing these terms not realizing that(…)

List all RMAN backups that are needed to recover

By Franck Pachot . 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(…)

Optimized 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 extensible there is a(…)

tmux – an alternative to screen

You may already use screen for multiplexing a terminal. This is especially useful when you want to start long running processes on a server and do not want to loose the connection because of a ssh connection timeout,(…)

does impdb into a compressed table really compress data?

Today at a customer we discussed the following scenario: To refresh a test database a datapump export and import was implemented. To save space on the test system the idea came up to compress the data on the test system.

Using VSS snapshots with SQL Server – part I

  This is probably a series of blog posts about some thoughts concerning VSS snapshots with database servers. Let’s begin with this first story: Some time ago, I implemented a backup strategy at one of my customers based on FULL(…)

Get the main information from SQL Server databases with PowerShell

As I promised in my previous blog Get the main Administration Information from SQL Server with PowerShell, I will present you this time how to retrieve the SQL Server databases information with PowerShell. Disclaimer: I am not a(…)

Get SQL Server Network Configuration with PowerShell

This blog is part of a set which try to automate the SQL Server administration with PowerShell. It explains how to retrieve the network configuration of a SQL Server instance with PowerShell. I will refer to my previous blog Get(…)

What will be coming with the next major version of postgresql ?

A PostgreSQL major version is usually released once a year. For the next major version, which is 9.5, this probably will be in the second half of 2015. As PostgreSQL is an open source product everything that(…)

Variations on 1M insert (6): CPU Flame Graph

By Franck Pachot . 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(…)