The latest version of Enterprise Manager, EM 220.127.116.11, has been announced! The announcement can be seen here. Obviously, there will be a number of posts that come out about it over the next few weeks, so I’ll add this post here as a quick notification and will update it with links to more information as it becomes available.
After my recent rant about broken URLs, I thought it would be sensible to say something a little more constructive, so this is what I would do if I were asked to structure the documentation. Other opinions are valid.
Base URL: I’m assuming the base URL for the database documentation will never change again from it’s current value.
A recent OTN post demonstrated a very important point about looking at execution plans – especially when you don’t use the right data types. The question was:
We’ve this query which throws invalid number
SELECT * FROM table A WHERE A.corporate_id IN (59375,54387) AND TRUNC(created_dt) BETWEEN '19-DEC-14' AND '25-DEC-14';
However it works fine if we use not in instead of in
SELECT * FROM table A WHERE A.corporate_id NOT IN (59375,54387) AND TRUNC(created_dt) BETWEEN '19-DEC-14' AND '25-DEC-14';
I’ve been playing around with running databases in the cloud recently. It’s quite simplistic stuff, just to get a feel for it and investigate the possibilities of using it for some projects at work. Here’s what I’ve got so far.
SLOB 2.3 is soon to be released. This version has a lot of new, important features but also a significant amount of tuning in the data loading kit. Before sharing where the progress is on that front, I’ll quickly list some of the new important features that will be in SLOB 2.3:
I mentioned in a recent post that Oracle are often guilty of changing URLs, which breaks all the documentation links in your site. Someone replied with this link. I knew I had a lot of clean-up to do, but I expected most of it to be old URLs, like stuff pointing to 8i, 9i etc.
I’ve just been looking and vast swathes of links have been changed in the 12.1 docs. In some cases, articles I wrote a couple of weeks ago are screwed. The reference manual is guilty of this big time!
If you are interested in array-level data reduction services and how such technology mixes with Oracle Database application-level compression (such as Advanced Compression Option), I offer the link below to an EMC Lab Report on this very topic.
To read the entire Lab Report please click the following link: Click Here.
The following is an excerpt from the Lab Report:
EMC XtremIO storage array offers powerful data reduction features. In addition to thin provisioning, XtremIO applies both deduplication and compression algorithms to blocks of data when they are ingested into the array. These features are always on and intrinsic to the array. There is no added licensing, no tuning nor configuration involved when it comes to XtremIO data reduction.
Recently I was asked the question “What is the real difference between EM Cloud Control [NOTE: I’ll refer to this as EM12c through the rest of this post] and EM Database Express in 12c?” It was (for me) a pretty easy question to answer, but I wanted to provide the questioner with a link to the place in the Enterprise Manager documentation where it covers that in detail. Somewhat to my surprise, I wasn’t able to find such a link – well, not quickly anyway. I think the reason for that is the documentation for EM Express (as it’s more commonly abbreviated to) falls under the database documentation which is owned by a different group in Oracle than the Enterprise Manager documentation. Well, that’s my speculation anyway. It may just be there in the documentation and I couldn’t find it in my quick search.
From time to time someone publishes a query on the OTN database forum and asks how to make it go faster, and you look at it and think it’s a nice example to explain a couple of principles because it’s short, easy to understand, obvious what sort of things might be wrong, and easy to fix. Then, after you’ve made a couple of suggestions and explained a couple of ideas the provider simply fades into the distance and doesn’t tell you any more about the query, or whether they’ve taken advantage of your advice, or found some other way to address the problem.
Such a query, with its execution plan, appeared a couple of weeks ago:
A question I get asked fairly often when I’m at conferences, either during the Q&A for my sessions or in general chit chat (a.k.a. networking) afterwards is “I want to play around with the features in Enterprise Manager 12c but don’t want to do that in our Production environment. How do I go about installing a copy of Enterprise Manager 12c somewhere else in the easiest way as a test environment?” The answer to that is pretty straightforward. It’s to download the relevant VM template from Oracle’s Software Delivery Cloud. Note: The screenshots shown in this post are from the new and enhanced Oracle Software Delivery Cloud, rather than the classic Software Delivery Cloud, so if you use the classic form your screens will be different. On the first screen, make sure you understand the export restrictions and click “Accept”: