Everything our consultants learn while running databases for customers: Oracle, PostgreSQL, SQL Server, MySQL, MariaDB, MongoDB and Delphix. Expect hands-on posts about installation, day-to-day administration, backup and recovery, performance tuning, replication and upgrades.
By Mouhamadou Diaw Barman is a tool to perform backup and recovery for PostgreSQL databases. It can do backup using two methods: -rsync/ssh -streaming In this blog I am going to explain how to use these two methods to backup a PostgreSQL database. Generally it is a good practice to dedicate a server for barman instead of installing it on…
Oracle released a new way to search for database features, and it is … ..really great. Try out the cool new search application for Oracle database features. What is special about? The new site gives you a very smart overview of the database features and in which version they are available (at least from 11-19) As example, when you search…
Introduction It’s the first edition of the Techdays, the Oracle community event in Belgium. This event happened in Antwerp these past 2 days, and a lot of speakers came from around the world to talk about their experience on focused subjects. Really amazing to heard such high-level conferences. And it was a great pleasure for me because I’ve been working…
I have already written a post about prepared statements in PostgreSQL some time ago. What I did not mention in that post is the concept of generic and custom plans. So lets have a look at those. As always, we start with creating a demo table and populate that table with some sample data: pgbench=# create table demo ( a…
The Italian Oracle User Group (ITOUG) is an independent group of Oracle enthusiasts and experts which work together as volunteers to promote technical knowledge sharing in Italy. Here the ITOUG Board members: This year ITOUG Tech Days take place in Milan on 30th January and in Rome on 1st February. Two different streams for each event: – Database – Analytics…
On a DG environment, a datafile needs to be recovered on the STANDBY site, in two situations : when is deleted or corrupted. Below, I will explain how to recover a corrupted datafile, in order to be able to repair the Standby database, without to be necessary to restore entire database. Initial situation : DGMGRL> connect / Connected to “PROD_SITE2″…
I’m currently working in a project to migrate a 11g-Datawarehouse-database from Solaris to Linux Intel (Endian-change). We do use the cross platform incremental backups method as described in My Oracle Support Note 1389592.1 for that. I.e. incremental backups are applied to database files and during the migration the recovered datafiles are attached to the target database via the transportable tablespace…
Recently a commit landed in the PostgreSQL development tree that made me aware of something I did not know so far: When you start PostgreSQL with a script using pg_ctl and that script was cancelled the postmaster was killed as well before PostgreSQL 12. Sounds weird? Lets do a little demo. The little demo script is quite simple: Print the…
By Mouhamadou Diaw wal_level determines the quantity of information written to the WAL. With PostgreSQL 11 the parameter wal_level can have 3 values: -minimal : only information needed to recover from a crash or an immediate shutdown -replica : enough data to support WAL archiving and replication -logical : enough information to support logical decoding. If we want to use…
Often Linux systems are connected to LDAP via sssd. A high CPU consuming sssd can be seen in top, like below ( e.g. 89.4 % CPU usage): 9020 root 20 0 1296344 466780 333364 R 89.4 0.8 41:20.17 sssd_nss 27227 oracle 20 0 2371676 48320 29732 S 4.3 0.1 27:00.70 oracle One reason could be default configuration of /etc/nsswitch.conf: passwd:…
Today (actually right now) we are a proud sponsor of the Red Hat Forum Switzerland 2019 in Geneva. With around 300 people attending this is quite a huge event and we had a lot of interesting discussions with other partners as well as existing customers or just people we met and didn’t know before. First of all we focused on…
This write-up follows my first article about helm chart with SQL Server. This time, I would like to cover the availability groups topic and how to deploy them with helm charts. In fact, to go through this feature for AGs was motivated to its usage in our Azure DevOps CI pipeline in order to deploy a configurable one on an…
