Infrastructure at your Service

Category Archives: Database Administration & Monitoring

Nathan Courtine

syspolicy_purge_history job and PowerShell ExecutionPolicy

By | Database Administration & Monitoring | No Comments

Since SQL Server 2008, Microsoft has introduced a system job called “syspolicy_purge_history”. This job is installed and enabled by default, and it contains three steps scheduled at 02:00 AM:   What is this job? And what is it for? Since SQL Server 2008, a new feature called Policy Based Management has been added. When your policies are run, the results are stored in the msdb. But without a purge mechanism, msdb will keep growing. So…

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Daniel Westermann

Maintenance scenarios with EDB Failover Manager (3) – Witness node

By | Database Administration & Monitoring | 2 Comments

In the last posts ( Maintenance scenarios with EDB Failover Manager (1) – Standby node , Maintenance scenarios with EDB Failover Manager (2) – Primary node ) we looked at how to perform maintenance operations on the master as well as on the standby node in a failover cluster managed by EDB Failober Manager. What is still open is how to perform maintenance operations on the witness node. So, lets go.

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Daniel Westermann

Maintenance scenarios with EDB Failover Manager (2) – Primary node

By | Database Administration & Monitoring | 4 Comments

In the last post I looked at how you can do maintenance operations on the standby node when you are working in a PostgreSQL cluster protected by EDB Failover Manager. In this post I’ll look on how you can do maintenance on the primary node (better: the node where the primary instance currently runs on). This requires slightly more work and attention. Lets go.

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Oracle Team

A short glance at Attunity replicate

By | Database Administration & Monitoring | 6 Comments

By Franck Pachot . If you follow my blog, you should know that I really like Dbvisit replicate because it’s simple, robust, has good features and excellent support. But that’s not a reason to ignore other alternatives (and this is the reason of http://www.dbi-services.com/news-en/replication-event-2/). When you have heterogeneous sources (not only Oracle) there is Oracle Golden Gate with very powerful possibilities, but maybe not an easy learning curve because of lack of simple GUI and…

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Mouhamadou Diaw

Oracle 12C Unified Auditing Feature in a multitenant environment

By | Database Administration & Monitoring | No Comments

In oracle 12c we have a new feature called Unified Auditing. What is it, how to implement it, how it works in a multitenant environment that’s what we will try to explain briefly in this article. Traditional oracle audit involves many audit-trail locations and tables and does not follow a standard. To help with this oracle 12c has introduced Unified Auditing  1- Enabling Unified Auditing By default the feature is disabled SQL> select value from…

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Daniel Westermann

The (almost) same sample schema for all major relational databases (1) – PostgreSQL

By | Database Administration & Monitoring | No Comments

The are times when it would be nice to have the same sample schema in all relational databases you or your company are working on. This is great if you want to compare how different databases execute the same tasks on the same data. This can be great if you want to test logical replication between different databases and this might be great if you want to test migration tools that support you in migrating…

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Oracle Team

Transparently externalize BLOB to BFILE

By | Database Administration & Monitoring | One Comment

By Franck Pachot . Storing documents within the database is the easiest, especially because you get them consistent with the metadata stored in the database. If you store them externally, then you need to manage their backup, their synchronization to standby site, the consistency in case of flashback or PITR, etc. However, documents grow (in number and in size thanks to better resolution of scan) and you don’t want a database where half of the…

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VM Linux – Device not found : Network unreachable

By | Database Administration & Monitoring, Operation systems | No Comments

Recently I exported an Oracle Virtual Box VM as an “.ova” file. When the file was imported again I faced issues with the network devices inside the VM. This post is about what I experienced and how I resolved it. In my example I have two networks devices configured for the VM in the Virtual Box: When I logged in I found that eth0 and eth1 are not available: [root@MYSQL ~]# ifconfig lo Link encap:Local…

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