This is based on the presentation Juan Loaiza gave regarding What’s new with Exadata. While a large part of the presentation focussed on what was already available, there are quite a few interesting new features that are coming down the road.
First of was a brief mention of the hardware. I’m less excited about this. The X4 has plenty of the hardware that you could want: CPU, memory and flash. You’d expect some or all (more...)
Many thanks to all those who attended my session "SQL Tuning without Trying" at Oracle Open World 2014 #oow14. I hope you found the session useful.
If you want to download the slide deck, here
it is. As always, I would really, really like to hear from you.
Especially on this Monday it seems all about new database data intern ration technologies and support for more data formats. Now adding in 126.96.36.199 native...
The multitenant architecture Needs enterprise edition and the multitenant option. Consists of a CDB (Container database) and zero, one or up to 252 PDBs (pluggable databases). Has a root container (the CDB itself) and a seed container (template to create PDBs) There is only one instance per CDB. A PDB doesn’t have : background processes [...]
The post OCP 12C – Basics of Multitenant Container Database (CDB) appeared first on Oracle DBA Scripts and (more...)
Thank you all those who attended my session Cache Fusion Demystified.
As I mentioned, it was impossible to fit in a demo within that compressed 45 minute timeline. I put the details of the demo
in a separate file with all the scripts and instructions that allows you to execute the demos at your own site.Download the slide deck
as well as the scripts. In addition I have also written a whitepaper
to explain (more...)
EM Database Express The old Enterprise Manager database control is replaced by Enterprise Manager database express in Oracle 12c. It contains only basic administration capabilities as the advanced ones are included in Enterprise Manager cloud control With EM database Express you can manage Security (Users, roles, profiles), Configuration (Instance Parameters, memory, database features), Storage (tablespaces, [...]
The post OCP 12C – Enterprise Manager and Other Tools appeared first on Oracle DBA Scripts and Articles (more...)
It’s been about 8 months since I posted a little note about a “notable change in behaviour” of the optimizer when dealing with subqueries in the where clause that could be used to return a constant, e.g.:
where id between (select 10001 from dual)
and (select 90000 from dual)
There’s been a note at the start of the script ever since saying: Check if this is also true (more...)
The Grid Infrastructure filesystem was reporting that it was a bit full today (release 188.8.131.52). This was tracked down to the “crfclust.bdb” file, which records information about the cluster health for monitoring purposes. It was 26GB. It’s not supposed to get bigger than 1GB so this is probably a bug, but let’s explicitly resolve the size issue right now and search Oracle support later. Worst case, bdb (Berkerley Database) files get (more...)
Sometimes we occasionally just miss the obvious, for years. Just noticed that an easy way to release code to a particular schema is to login as your normal DBA user (USER1) [as preferred by audit], use the alter session command to switch to point to the release schema (USER2) and run your DDL. Oracle behaves, from an object-owner perspective, as if you are logged-in as the schema owner without all the negative aspects of actually (more...)
Thank you all those who came to attend my session "Demystifying Cache Buffer Chains Latches" at Oracle Open World 2014. Much appreciated. I hope you got something out your time investment.
I have also written a paper to accompany this session. The paper explains the concepts I presented in greater detail. You can download a zip file containing the slide deck, the paper and the scripts here
. Please note: this is a zip file.
It’s funny this might be one of the first time in years that my strange performance hobbies I have (on the side of my regular...
Disclosure: I'm attending Openworld at the invitation of the OTN ACE Director program who are paying for my flights, hotel and conference fee. My employer has helpfully let me attend on work time, as well as sending other team mates because they recognise the educational value of attending. Despite that, all of the opinions expressed in these posts are, as usual, all my own.
The first day of the ACE D briefing was a bit (more...)
On the Toad World site, I’m writing a series of blog posts and Wiki articles on the subject of EXPLAIN PLAN. I’m using EXPLAIN PLAN as a motif to teach not just SQL tuning but also relational theory, logical database design, and physical database design. In a year’s time, I hope to have enough material for […]
Are you going to Oracle OpenWorld 2014? I am, and I hope to see you there! As you probably know, OpenWorld is a humongous event with tens of thousands of people in attendance and some amazing presentations. Why, I even hear Oracle’s new CTO might be there. I wonder if he has anything to talk about?
This year we’ll have a ton of activity at the Delphix booth. You can check out the speaking schedule, (more...)
As I have worked in server-side a long time as System Administrator. I must spend with logs. To use it for checking and investigation in issue. As some policies in some Companies, they want to keep logs over year or over ten years. So, it is not unusual to find out idea to store, integrate logs and do something.
A book tittle "I Heart Logs - Event Data, Stream Processing, and Data Integration"
I was testing SQL plan baselines on a base 184.108.40.206 release of Oracle on a 64 bit Linux virtual machine. I ran DBMS_SPM.LOAD_PLANS_FROM_CURSOR_CACHE to create a SQL plan baseline for a test query after running that query once to get its plan in the cursor cache. When I ran the test query after creating the SQL plan baseline and called dbms_xplan.display_cursor to see its new plan I got (more...)
Here’s a quick rundown of places I plan to be during the week.
|Sunday 9/28/14 3:30
||Expert Oracle Exadata: Then and Now [UGF6626]
||I’ll be participating in the Exadata Then and Now Panel with Tanel Poder, Andy Colvin, Martin Bach, Karl Arao, Frits Hoogland and anyone else we can drag in. The idea is to get book authors from “Apress Expert Oracle Exadata” version 1 and version 2 (due out by the (more...)|