Karl Reitschuster's Oracle Space

Upgrading from Oracle Database 10g to 11g: What to expect from ...

Karl Reitschuster — Mon, 12 Oct 2009 05:36:53 +0000

Almost 3 years after introducing Oracle 11g Release 1 Oracle posted a white paper migrating CBO from Oracle 10g to 11g; Ok - better late then never. There are a lot of topics so the white paper is well recommended to read; you will find it here

/Karl

Converting Timestamp to Date ...

Karl Reitschuster — Fri, 09 Oct 2009 11:49:21 +0000

Hi reader,

i needed to convert the date fraction from a times tamp type variable; Usually the way is to convert the time stamp to string and then to convert it back to date; Hmmm ... . This looks not very elegant ;-)

Oracle 11g Release 2 coming soon

Karl Reitschuster — Wed, 29 Jul 2009 07:40:46 +0000

Hi,

got an E-Mail for a Oracle 11g Release 2 Roads how.

It seems 11.2 is coming soon; Most interesting which platforms will be served first. A lot of platforms even had no 11.1 release deployed. for example Mac OS X, Sun Solaris X86_64, ...

Our environment running with 10.2 will be candiates for 11.2!!

/Karl

Oracle 10.2.0.4 for for MAC OS X on Intel x86-64 released

Karl Reitschuster — Thu, 23 Apr 2009 14:13:16 +0000

Hi Reader,

i could not believe it;

but it's true. Oracle continues to develop Oracle Server on Mac OS X; and shipped now Oracle 10.2 for OSX;

Here the download link : Oracle Database 10g Release 2 (10.2.0.4.0) for MAC OS X on Intel x86-64

and much thanks to Oracle;

/Karl

PS.: there are some restrictions to the release - for example DbConsole would not work ...

Zone Alarm !!!

Karl Reitschuster — Thu, 15 Jan 2009 08:08:40 +0000

Hi,

the title is not a title of a Science Fiction film or of a Hackers memories intruding networks or a gaming title but is SUN Solaris related. SUN Solaris 5.10 introduced a virtualization concept called Zones. A Zone is like a logical/virtual machine on a SUN Server Hardware. Zones are nearer bound to resources then for example a VM like VMware or Parallels (on Mac); This keeps the frictional loss of resources lower.

At our customer site database servers are driven in SUN Solaris Zones. Resources dependend on the implementation of a zone could be shared between the Zones. Hardware is better utilized.

But one drawback is here - it's to specify performance;

Terracotta - the return of OODBMS?

Karl Reitschuster — Fri, 12 Dec 2008 07:04:18 +0000

Do you remember?

About 10 years ago OODBMS (Poet, Gemstone, Versant, ...) seemed to be starting to replace RDBMS; The idea for using OODBMS was simple - if the programming model is OOP why not persist Objects with an OODBMS directly instead of populating it's properties and class hierarchy into a couple of tables? It was the reason Oracle 8 came with object relational features; But they (OODBMS) failed for following reason:

Tanel Poders - Snap it!!!

Karl Reitschuster — Mon, 10 Nov 2008 15:34:01 +0000

Tanel Poder holds a 2 day session in Düsseldorf last week; This was not my first Tuning/Troubleshooting training. But it was extraordinary what Tanel showed us when usual ways would not work

Oracle 12 the Green Database - Oracle 12 Eco

Karl Reitschuster — Tue, 14 Oct 2008 11:54:55 +0000

Now living in a time of financial crisis and a growing gap of natural resources
a new paradigma - a new database paragdima is needed.

For Oracle 12 i think this could be Oracle 12 Eco;

Setting DBMS_STATS Environment

Karl Reitschuster — Wed, 01 Oct 2008 14:05:24 +0000

Hi Reader,
with Oracle 10g all default parameters of the DBMS_STATS package are defined as default in the data dictionary accessible with the DBMS_STATS GET_PARAM Method :

Tuning Leading '%' Queries - a simple approach

Karl Reitschuster — Fri, 19 Sep 2008 13:42:47 +0000

Hi reader,

usually queries using LIKE and leading '%' cannot be indexed. So an idea would be to mirror the string content with the string reverse function to be able to put the '%' operator at the end :