Security Features of Standard Edition (One) – Part 1

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A closer look on database hosts

The last couple of years quite a few organizations had a difficult time and internal costs where a main focal point was to save money. License costs was one thing where many IT-managers put their question marks and so often the decision was made to downgrade the Oracle database back to Standard Edition. On the other hand, often smaller organizations have embedded SE’s as part of their applications (more...)

Annonce : Oracle Database In-Memory Advisor

Oracle Database In-Memory Advisor est maintenant disponible.
Pour utiliser cet assistant, le "Database Tuning Pack" est nécessaire.

Plus d'information :
  • Page OTN
  • Note MOS 1965342.1

Complément : Tutoriels sur Oracle Public Cloud

Complément : Vidéos Oracle Public Cloud

Test MySQL on AWS quickly

Using sysbench to performance test AWS RDS MySQL hardware is an easy three step  operation. 

Sysbench creates synthetic tests and they are done on a 1 mil row 'sbtest' table that sysbench creates in the MySQL database you indicate. The test doesn't intrude with your database schema, and it doesn't use your data, so it is quite safe. The test is an OLTP test trying to simulate event operations in the database as it (more...)

Oracle Exadata X5: The Road To Ten Billion Dollars

money

Now that the dust has settled on the announcement of Oracle’s new Exadata X5 Database Machine, I’ve been doing some research in order to update my History of Exadata post (it’ll be ready soon). While reviewing the datasheets and other collateral for the X5 I was struck by the meteoric increase in one particular statistic: the number of processor cores on each database server. Oracle is riding that Moore’s Law train all the way to the bank.

(more...)

Statistics Collection Enhancements on Oracle Database 12c

I’ve been having a play around with the enhancements to the statistics collection in 12c. I’ve put together this top-level post with links to all my other articles on this subject.

Here are the new articles it links to.

Changed licensing rules for Exadata X5-2 with OracleVM

On 21 January 2015, Oracle announced Exadata X5, the sixth revision of Oracle’s database management system (DBMS) engineered system.

The entire Exadata configuration no longer needs to be licensed when using OracleVM. Instead, a minimum of 40% of the cores in a server must be licensed. This information has been published in an update of the partitioning document.

Gartner wrote a blogpost about this.

The purpose of  this blogpost in front of you is just (more...)

Deprecation of Non-CDB Architecture in Oracle 12c

dead-end

Back in July 2013, Oracle released the latest version of its flagship database product, Oracle 12c. Among the usual fanfare was information about a number of new options – including one known as Multitenant. With the Multitenant option, databases use a new architecture which features a container database (or CDB) which in turn contains one or more pluggable databases (or PDBs). Use of Multitenant requires a licence – which at the time of writing retails at $17,500 (more...)

Pre-Built Oracle Database 12.1.0.2 on VirtualBox

Step by step screenshots showing the installation of Virtual box and configuring pre-built Oracle Database 12.1.0.2 (including in-memory option). A quick way to get started on Oracle Database 12c. This is a very easy setup, though many do not know how easy it is to get started and playing with Oracle Database 12c on Linux […]

Complément : Analyse de performances via AWR Warehouse


Annonce : Workshop DBaaS

Un workshop sur le sujet DBaaS, à destination des partenaires Oracle, aura lieu le 4 et 5 mars à Colombes (France)
Plus de détails : http://eventreg.oracle.com/profile/web/index.cfm?PKWebId=0x1713052088

Oracle GoldenGate Processes – Part 4 – Replicat

The replicat process is the apply process within the Oracle GoldenGate environment.  The replicat is responsible for reading the remote trail files and applying the data found in cronilogical order.  This ensures that the data is applied in the same order it was captured.  

Until recently there was only one version of a replicat, that version was the classic version.  As of 12.1.2.0, there are now three distinct versions of a (more...)

MySQL Locking

Have you ever wondered if MySQL does Row Level Locking? Or wondered why are you getting the error:

ERROR 1205 (HY000) : Lock wait timeout exceeded; try restarting transaction

You get the error because your allocated time to hold a DML lock in a transaction exceeds the set limit. Usually the default limit to hold a DML row lock, set by innodb_lock_wait_timeout db parameter, is 50 seconds. If your transaction doesn't commit/rollback within 50 seconds (more...)

Cloud Control Agent 12c managing many objects

An Oracle Enterprise Management Agent 12c that has to manage hundreds of objects needs extra tweaking. If not, it will not start, or it will die soon, leaving you with an unmanaged infrastructure.

Situation

The customer runs over 200 databases on 1 host. Intel bases host with 384GB RAM and over 4TB of storage. Linux OS. Works as a charm.
Enterprise Manager 12c Release 4, Agent Version 12.1.0.4.0.

The databases should (more...)

OTech Magazine – Winter 2014

OTech Magazine – Winter 2014

OTech Magazine winter 2014The winter edition of OTech Magazine, the independent magazine for Oracle professionals, is available. In OTech Magazine – Winter 2014 subjects include:

  • Time Series Forecasting in SQL
  • Flashback – Empowering Power Users
  • Starting WebLogic
  • DevOps and Continuous Delivery for Oracle
  • The Rapid Reaction Force – real time business monitoring

Download OTech Magazine Winter 2014 here.

deltalounge

Oracle AWR Reports: When IOStats Lie

graph

If you’ve been unfortunate enough to follow my dithering on Twitter recently you’ll know that I’ve been lurching between thinking that there is and isn’t a problem with Oracle’s tracking of I/O statistics in its AWR reports.

I’m now convinced there is a problem, but I can’t work out what causes it… so step 1 is to describe the problem here, after which step 2 will probably be to sit back and hope someone far (more...)

New Cookbook: Oracle Linux 6 Update 5 within an Oracle VM Template

Oracle-VMI’ve posted a new installation cookbook for using Oracle within a virtual machine running on Oracle VM. Surprisingly, I was unable to come up with a satisfactory method of accessing external storage that did not involve the use of Oracle ASMLib

Oracle Linux 6 Update 5 within an Oracle VM Template


Filed under: Blog, Cookbooks, Database, Flash, Linux, Storage Tagged: cookbooks, database, oracle, oracle vm

Oracle database operating system memory allocation management for PGA

This post is about memory management on the operating system level of an Oracle database. The first question that might pop in your head is: isn’t this a solved problem? The answer is: yes, if you use Oracle’s AMM (Automatic Memory Management) feature, which let’s you set a limit for the Oracle datababase’s two main memory area’s: SGA and PGA. But in my opinion any serious, real life, usage of an Oracle database on Linux (more...)

RELY trumps DISABLE

Learning, relearning or unforgetting…

What value is there in a DISABLEd constraint?

This was a question on the OTN forums this week and a) my first reply was wrong and b) I couldn’t find a clear demonstration elsewhere.

The documentation is clear.

RELY Constraints

The ETL process commonly verifies that certain constraints are true. For example, it can validate all of the foreign keys in the data coming into the fact table. This means that (more...)