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Running PostgreSQL on ZFS on Linux – Compression

In the last posts in this little series we looked at how to get a ZFS file system up and running on a CentOS 7 host and how snapshots and clones can be used(…)

Oracle 12c and RMAN automatic datafile creation

By William Sescu A lot of new features popped up with RMAN 12c, like  Expansion of Multi-section support, or Simplified cross-platform migration and many many more. However, in this post I would like to highlight a small, but very helpful(…)

Documentum story – HA configuration best practice

We went to a performance issue and some failed failover regarding the content server and the JMS. Thus we asked EMC for recommendations and it seems that the configuration can be slightly different than the official documentation. Here are the(…)

Running PostgreSQL on ZFS on Linux – Fun with snapshots and clones

In the last post we looked at how to get a ZFS file system up and running on a CentOS 7 host and how to enable the auto mount of the ZFS file systems. In this post(…)

Running PostgreSQL on ZFS on Linux

ZFS for Solaris is around for several years now (since 2015). But there is also a project called OpenZFS which makes ZFS available on other operating systems. For Linux the announcement(…)

Connecting your PostgreSQL instance to an Oracle database – Debian version

Some time ago I blogged about attaching your PostgreSQL instance to an Oracle database by using the oracle_fdw foreign data wrapper. This resulted in a comment which is the reason for this post: Doing the same(…)

When an index seek operator is not always your friend

Did you ever consider an index seek as an issue? . Well, let’s talk about a story with one of my customers where the context is pretty simple: a particular query that is out of the range of the application’s(…)

Oracle 12cR2: IS_ROLLING_INVALID in V$SQL

By Franck Pachot . In a previous post I published a test case to show when a cursor is not shared anymore after a rolling invalidation. Basically the dbms_stats marks the cursor as 'rolling invalid' and(…)

Modern software architecture – what is a database?

By Franck Pachot . This blog post is focused at developers and software architects. I'm probably not writing at the right place. You're on an infrastructure experts blog and the author is an Oracle DBA. So what can you learn(…)

MySQL 8.0.0 DMR – First impression

Last week (09/12/2016) was announced the new MySQL 8.0.0 DMR (Development Milestone Release) It is now available for download at dev.mysql.com I downloaded and installed it Following are my first impression on some new features First(…)