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• New Slides - and a discussion about Dictionary Statistics

  - by Mike Dietrich

  First of all we have just upoaded a new version of the Upgrade and Migration Workshop slides with some added information. So please feel free to download them from here.The slides have one new interesting information which lead to a discussion I've had in the past days with a very large customer regarding their upgrades - and internally on the mailing list targeting an EBS database upgrade from Oracle 10.2 to Oracle 11.2. Why are we creating dictionary statistics during upgrade? I'd believe this forced dictionary statistics creation got introduced with the desupport of the Rule Based Optimizer in Oracle 10g. The goal: as RBO is not supported anymore we have to make sure that the data dictionary has fresh and non-stale statistics. Actually that would have led in Oracle 9i to strange behaviour in some databases - so in Oracle 9i this was strongly disrecommended. The upgrade scripts got hardcoded to create these stats. But during tests we had the following findings: It's important to create dictionary statistics the night before the upgrade. Not two weeks before, not 60 minutes before your downtime begins. But very close to the upgrade. From Oracle 10g onwards you'd just say: $ execute DBMS_STATS.GATHER_DICTIONARY_STATS; This is important to make sure you have fresh dictionary statistics during upgrade for performance reasons. Tests have shown that running an upgrade without valid dictionary statistics might slow down the whole upgrade by factors of 2x-3x. And it would be also a great idea post upgrade to create again fresh dictionary statistics when you've did suppress the stats creation during the upgrade process. Suppress? Yes, you could set this underscore parameter in the init.ora: _optim_dict_stats_at_db_cr_upg=FALSE to suppress the forced dictionary statistics collection during an upgrade. We believe strongly that (a) people using the default statistics creation process which will create dictionary statistics by default and (b) create fresh stats before upgrade on the dictionary. Therefore we find it save once you have followed our advice to use the underscore during upgrade. And we've taken out that forced statistics collection during upgrade in the next release of the database. Please note: If you are using the DBUA for the upgrade it will remove underscore parameters for the upgrade run to improve performance - which is generally a good idea. So you'll have to start the DBUA with that call: $ dbua -initParam "_optim_dict_stats_at_cb_cr_upg"=FALSE -Mike

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• A problem with texture atlasing in Unity

  - by Hamzeh Soboh

  I have the texture below and I need to get rectangular parts from it. I could finally combine meshes of different quads to improve performance, but I with quads of different tilings, this means different materials, then combining meshes will fail. Can anybody tell me how to have a part of that texture in C#? Such that all quads will be of the same material only then combining meshes passes. Thanks in advance.

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• SQLAuthority News Three Posts on Reporting T-SQL Tuesday #005

  If you are following my blog, you already know that I am more of T-SQL and Performance Tuning type of person. I do have a good understanding of Business Intelligence suit and I also do certain training sessions on the same subject. When I was writing the blog post for T-SQL Tuesday #005 Reporting, [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Radeon all in Wonder 8500 Series, Why is it Called so?

  Possess a radeon all in wonder 8500 series and a 128-bit DDR memory and you can push your personal computer to its extreme with an astounding 3-D performance with additional TV, DVD and video editing... [Author: Sunny Makkar - Computers and Internet - March 20, 2010]

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• thunar-archive-plugin not working

  - by Sergio

  After I experienced serious not yet resolved performance issues with Nautilus I decided to move to XUbuntu so I installed its metapackage from Ubuntu and started using it. It turns out that the archive plugin for Thunar (provides the "Extract here" option in the contextual menu when right clicking over a compressed archive) is not working, even after I apt-get purged it and reinstalled. It simply doesn't show its options in the contextual menu. What should I do to make it work?

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• Intel Gma500 support for Oneiric Ocelot

  - by lucazade

  I would like to know if the new opensource video driver included in kernel 3.0.x for the Intel Gma500 will be included by default in the kernel that will be shipped in OO. The driver support of this gfx chipset has always been poor and mainly community-driven, now finally we have a KMS opensource driver, written by kernel hackers, and actually included in staging kernel repo. If there is any kind of testing needed there is a mega-thread on ubuntu-forums with hundreds of users ready to test everything :)

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• How to boot from a debootstrap based install?

  - by João Pinto

  I would like to boot a testing Ubuntu release from a directory (which contains a debootstrap based install). As far as I understand I just need someway to tell the boot process (initrd scripts?) that it should chroot() into the specified dir immediately after mounting the root partition, and then resume the regular upstart/init start. Could someone provide some instructions on how to achieve this?

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• Why does DVD playback still not work after installing libdvdcss2?

  - by mac9416

  I have installed libdvdcss2, but I still get this error when trying to play DVDs: libdvdread4 was installed by default (This is a new System76 Pangolin Performance). I ran the install-css.sh script, and it completed with no problems. I can confirm that libdvdread4 and libdvdcss2 are installed: mac9416@charlotte:~$ dpkg -l | grep dvdcss ii libdvdcss2 1.2.12-0.0medibuntu1 Simple foundation for reading DVDs - runtime libraries mac9416@charlotte:~$ dpkg -l | grep dvdread ii libdvdread4 4.2.0-1ubuntu3 library for reading DVDs

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• Oracle Technology Network April 2012 Special Offers

  - by programmarketingOTN

  Several of our books publishing partners have added new titles to the list of books they are offering discounts on.  To see full details and get discount links/codes please visit the OTN Member Discount page.  The Oracle store has also extended their 15% discount until the end of the month as well.  Happy Shopping!Oracle Press - Effective MySQL: Backup and Recovery Oracle Database 11g Performance Tuning Tips & Techniques Packt Publishing - Oracle WebCenter 11g PS3 Administration Cookbook Oracle Service Bus 11g Development Cookbook Pearson Java Application Architecture

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• First PC Build (Part 1)

  - by Anthony Trudeau

  Originally posted on: http://geekswithblogs.net/tonyt/archive/2014/08/05/157959.aspxA couple of months ago I made the decision to build myself a new computer. The intended use is gaming and for using the last real version of Photoshop. I was motivated by the poor state of console gaming and a simple desire to do something I haven’t done before – build a PC from the ground up. I’ve been using PCs for more than two decades. I’ve replaced a component hear and there, but for the last 10 years or so I’ve only used laptops. Therefore, this article will be written from the perspective of someone familiar with PCs, but completely new at building. I’m not an expert and this is not a definitive guide for building a PC, but I do hope that it encourages you to try it yourself. Component List Research There was a lot of research necessary, because building a PC is completely new to me, and I haven’t kept up with what’s out there. The first thing you want to do is nail down what your goals are. Your goals are going to be driven by what you want to do with your computer and personal choice. Don’t neglect the second one, because if you’re doing this for fun you want to get what you want. In my case, I focused on three things: performance, longevity, and aesthetics. The performance aspect is important for gaming and Photoshop. This will drive what components you get. For example, heavy gaming use is going to drive your choice of graphics card. Longevity is relevant to me, because I don’t want to be changing things out anytime soon for the next hot game. The consequence of performance and longevity is cost. Finally, aesthetics was my next consideration. I could have just built a box, but it wouldn’t have been nearly as fun for me. Aesthetics might not be important to you. They are for me. I also like gadgets and that played into at least one purchase for this build. I used PC Part Picker to put together my component list. I found it invaluable during the process and I’d recommend it to everyone. One caveat is that I wouldn’t trust the compatibility aspects. It does a pretty good job of not steering you wrong, but do your own research. The rest of it isn’t really sexy. I started out with what appealed to me and then I made changes and additions as I dived deep into researching each component and interaction I could find. The resources I used are innumerable. I used reviews, product descriptions, forum posts (praises and problems), et al. to assist me. I also asked friends into gaming what they thought about my component list. And when I got near the end I posted my list to the Reddit /r/buildapc forum. I cannot stress the value of extra sets of eyeballs and first hand experiences. Some of the resources I used: PC Part Picker Tom’s Hardware bit-tech Reddit Purchase PC Part Picker favors certain vendors. You should look at others too. In my case I found their favorites to be the best. My priorities were out-the-door price and shipping time. I knew that once I started getting parts I’d want to start building. Luckily, I timed it well and everything arrived within the span of a few days. Here are my opinions on the vendors I ended up using in alphabetical order. Amazon.com is a good, reliable choice. They have excellent customer service in my experience, and I knew I wouldn’t have trouble with them. However, shipping time is often a problem when you use their free shipping unless you order expensive items (I’ve found items over $100 ship quickly). Ultimately though, price wasn’t always the best and their collection of sales tax in my state turned me off them. I did purchase my case from them. I ordered the mouse as well, but I cancelled after it was stuck four days in a “shipping soon” state. I purchased the mouse locally. Best Buy is not my favorite place to do business. There’s a lot of history with poor, uninterested sales representatives and they used to have a lot of bad anti-consumer policies. That’s a lot better now, but the bad taste is still in my mouth. I ended up purchasing the accessories from them including mouse (locally) and headphones. NCIX is a company that I’ve never heard of before. It popped up as a recommendation for my CPU cooler on PC Part Picker. I didn’t do a lot of research on the company, because their policy on you buying insurance for your orders turned me off. That policy makes it clear to me that the company finds me responsible for the shipment once it leaves their dock. That’s not right, and may run afoul of state laws. Regardless they shipped my CPU cooler quickly and I didn’t have a problem. NewEgg.com is a well known company. I had never done business with them, but I’m glad I did. They shipped quickly and provided good visibility over everything. The prices were also the best in most cases. My main complaint is that they have a lot of exchange only return policies on components. To their credit those policies are listed in the cart underneath each item. The visibility tells me that they’re not playing any shenanigans and made me comfortable dealing with that risk. The vast majority of what I ordered came from them. Coming Next In the next part I’ll tackle my build experience.

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• Exadata ROI cases

  - by Javier Puerta

  The following cases illustrate the type of ROI benefits that customers can obtain from their investment in Exadata infrastructure. Australian Finance Group will achieve a 42% ROI by and break even in three years by consolidating Oracle E-Business Suite and Siebel applications on Oracle Exadata.  Read the ROI case at: http://www.oracle.com/us/corporate/customers/afg-1-exadata-cs-1354807.pdf In addition to this study, there are Oracle Exadata Mainstay ROI Case Studies for the following: Merck -Pharma, Oracle Exadata Achieves Fivefold Performance Increase for Critical Product Research Platform Turkcell Accelerates Reporting Tenfold, Saves on Storage and Energy Costs with Consolidated Oracle Exadata Platform

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• What is difference between install desktop-environment and run directly distro?

  - by Pandya

  My question is what is difference between installing perticular desktop environment on Ubuntu And Using directly that (Default -environmented) distro/flavour of Ubuntu? Example: Two options: Install ubuntu-gnome-desktop or kubuntu-desktop or xubuntu-desktopetc. (official & recognized derivatives) alternatively on Ubuntu (Default -Unity Desktop) Use (Run) perticular distro/flavour Ubuntu-Gnome or Kubuntu or Xubuntu etc. I want to know is both method working same performance? and which is proper method to use Desktop Environment.

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• Behavior Driven Development (BDD) and DevExpress XAF

  - by Patrick Liekhus

  So in my previous posts I showed you how I used EDMX to quickly build my business objects within XPO and XAF.  But how do you test whether your business objects are actually doing what you want and verify that your business logic is correct?  Well I was reading my monthly MSDN magazine last last year and came across an article about using SpecFlow and WatiN to build BDD tests.  So why not use these same techniques to write SpecFlow style scripts and have them generate EasyTest scripts for use with XAF.  Let me outline and show a few things below.  I plan on releasing this code in a short while, I just wanted to preview what I was thinking. Before we begin… First, if you have not read the article in MSDN, here is the link to the article that I found my inspiration.  It covers the overview of BDD vs. TDD, how to write some of the SpecFlow syntax and how use the “Steps” logic to create your own tests. Second, if you have not heard of EasyTest from DevExpress I strongly recommend you review it here.  It basically takes the power of XAF and the beauty of your application and allows you to create text based files to execute automated commands within your application. Why would we do this?  Because as you will see below, the cucumber syntax is easier for business analysts to interpret and digest the business rules from.  You can find most of the information you will need on Cucumber syntax within The Secret Ninja Cucumber Scrolls located here.  The basics of the syntax are that Given X When Y Then Z.  For example, Given I am at the login screen When I enter my login credentials Then I expect to see the home screen.  Pretty easy syntax to follow. Finally, we will need to download and install SpecFlow.  You can find it on their website here.  Once you have this installed then let’s write our first test. Let’s get started… So where to start.  Create a new testing project within your solution.  I typically call this with a similar naming convention as used by XAF, my project name .FunctionalTests (i.e.  AlbumManager.FunctionalTests).  Remove the basic test that is created for you.  We will not use the default test but rather create our own SpecFlow “Feature” files.  Add a new item to your project and select the SpecFlow Feature file under C#.  Name your feature file as you do your class files after the test they are performing. Now you can crack open your new feature file and write the actual test.  Make sure to have your Ninja Scrolls from above as it provides valuable resources on how to write your test syntax.  In this test below you can see how I defined the documentation in the Feature section.  This is strictly for our purposes of readability and do not effect the test.  The next section is the Scenario Outline which is considered a test template.  You can see the brackets <> around the fields that will be filled in for each test.  So in the example below you can see that Given I am starting a new test and the application is open.  This means I want a new EasyTest file and the windows application generated by XAF is open.  Next When I am at the Albums screen tells XAF to navigate to the Albums list view.  And I click the New:Album button, tells XAF to click the new button on the list grid.  And I enter the following information tells XAF which fields to complete with the mapped values.  And I click the Save and Close button causes the record to be saved and the detail form to be closed.  Then I verify results tests the input data against what is visible in the grid to ensure that your record was created. The Scenarios section gives each test a unique name and then fills in the values for each test.  This way you can use the same test to make multiple passes with different data. Almost there.  Now we must save the feature file and the BDD tests will be written using standard unit test syntax.  This is all handled for you by SpecFlow so just save the file.  What you will see in your Test List Editor is a unit test for each of the above scenarios you just built. You can now use standard unit testing frameworks to execute the test as you desire.  As you would expect then, these BDD SpecFlow tests can be automated into your build process to ensure that your business requirements are satisfied each and every time. How does it work? What we have done is to intercept the testing logic at runtime to interpret the SpecFlow syntax into EasyTest syntax.  This is the basic StepDefinitions that we are working on now.  We expect to put these on CodePlex within the next few days.  You can always override and make your own rules as you see fit for your project.  Follow the MSDN magazine above to start your own.  You can see part of our implementation below. As you can gather from the MSDN article and the code sample below, we have created our own common rules to build the above syntax. The code implementation for these rules basically saves your information from the feature file into an EasyTest file format.  It then executes the EasyTest file and parses the XML results of the test.  If the test succeeds the test is passed.  If the test fails, the EasyTest failure message is logged and the screen shot (as captured by EasyTest) is saved for your review. Again we are working on getting this code ready for mass consumption, but at this time it is not ready.  We will post another message when it is ready with all details about usage and setup. Thanks

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• Parallel MSBuild FTW - Build faster in parallel

  - by deadlydog

  Hey everyone, I just discovered this great post yesterday that shows how to have msbuild build projects in parallel Basically all you need to do is pass the switches “/m:[NumOfCPUsToUse] /p:BuildInParallel=true” into MSBuild. Example to use 4 cores/processes (If you just pass in “/m” it will use all CPU cores): MSBuild /m:4 /p:BuildInParallel=true "C:\dev\Client.sln" Obviously this trick will only be useful on PCs with multi-core CPUs (which we should all have by now) and solutions with multiple projects; So there’s no point using it for solutions that only contain one project.  Also, testing shows that using multiple processes does not speed up Team Foundation Database deployments either in case you’re curious Also, I found that if I didn’t explicitly use “/p:BuildInParallel=true” I would get many build errors (even though the MSDN documentation says that it is true by default). The poster boasts compile time improvements up to 59%, but the performance boost you see will vary depending on the solution and its project dependencies.  I tested with building a solution at my office, and here are my results (runs are in seconds): # of Processes 1st Run 2nd Run 3rd Run Avg Performance 1 192 195 200 195.67 100% 2 155 156 156 155.67 79.56% 4 146 149 146 147.00 75.13% 8 136 136 138 136.67 69.85%   So I updated all of our build scripts to build using 2 cores (~20% speed boost), since that gives us the biggest bang for our buck on our solution without bogging down a machine, and developers may sometimes compile more than 1 solution at a time.  I’ve put the any-PC-safe batch script code at the bottom of this post. The poster also has a follow-up post showing how to add a button and keyboard shortcut to the Visual Studio IDE to have VS build in parallel as well (so you don’t have to use a build script); if you do this make sure you use the .Net 4.0 MSBuild, not the 3.5 one that he shows in the screenshot.  While this did work for me, I found it left an MSBuild.exe process always hanging around afterwards for some reason, so watch out (batch file doesn’t have this problem though).  Also, you do get build output, but it may not be the same that you’re used to, and it doesn’t say “Build succeeded” in the status bar when completed, so I chose to not make this my default Visual Studio build option, but you may still want to. Happy building! ------------------------------------------------------------------------------------- :: Calculate how many Processes to use to do the build. SET NumberOfProcessesToUseForBuild=1  SET BuildInParallel=false if %NUMBER_OF_PROCESSORS% GTR 2 (                 SET NumberOfProcessesToUseForBuild=2                 SET BuildInParallel=true ) MSBuild /maxcpucount:%NumberOfProcessesToUseForBuild% /p:BuildInParallel=%BuildInParallel% "C:\dev\Client.sln"

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• Help needed on a UI/Developer Interview

  - by AJ Seth

  I have a phone interview with a major Internet company and it is a mostly front-end developer position. If anyone has experience with UI/developer interviews and can give some advice/questions asked etc. that'll be great. Additionally, what resources can be read and reviewed for the following: Designing for performance, scalability and availability Internet and OS security fundamentals EDIT: Now I am told that the interview I am told will be mostly on coding, Data Structures, design questions etc. Anyone?

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• New OPN Certified Implementation Exam - Oracle Enterprise Manager 12C Essentials

  - by Javier Puerta

  This exam (1Z1-457) is now available in Beta testing. This certification differentiates candidates in the marketplace by providing a competitive edge through proven expertise and is intended for professionals who possess a strong technical background and exposure to Oracle Enterprise Manager 12c implementation. Take advantage and request a free beta exam voucher to [email protected]. Invite your partners to learn more about this exam here.

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• sudo apt-get update error ubuntu 12.04

  - by user111172

  Hi I'm new in Linux and I need your help :) Every time when i type sudo apt-get update it shows: alphaog@alphaog-HP-Pavilion-DV7:~$ sudo apt-get update E: Type 'ain' is not known on line 3 in source list /etc/apt/sources.list.d/ricotz-testing-precise.list E: The list of sources could not be read. I tried gksu gedit /etc/apt/sources.list and put # in front third line but it still doesn't work. Please Help! :)

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• Sound Channel map incorrect on an ION 330 ASRock

  - by math

  I have a ION 330 ASRock just updated on Precise and the sound channel mapping is incorrect. Channel map is set as follow: Front Left = Front left Center = Rear Left Front Right = Font Right Rear Right = LFE Rear Left = Center LFE = Rear Right I am testing the sound channel using speaker-test -c 2 -t wav Can some one tell me how I can remap easily? I have tried several possible changes to /etc/pulse/defaut.pa unsuccessfully.

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• Erlang web frameworks survey

  - by Zachary K

  (Inspired by similar question on Haskel) There are several web frameworks for Erlang like Nitrogen, Chicago Boss, and Zotonic, and a few more. In what aspects do they differ from each other? For example: features (e.g. server only, or also client scripting, easy support for different kinds of database) maturity (e.g. stability, documentation quality) scalability (e.g. performance, handy abstraction) main targets Also, what are examples of real-world sites / web apps using these frameworks?

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• Creating collection with no code (almost)

  - by Sean Feldman

  When doing testing, I tend to create an object mother for the items generated multiple times for specifications. Quite often these objects need to be a part of a collection. A neat way to do so is to leverage .NET params mechanism: public static IEnumerable<T> CreateCollection<T>(params T[] items) { return items; } And usage is the following: private static IEnumerable<IPAddress> addresses = CreateCollection(new IPAddress(123456789), new IPAddress(987654321));

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• SQLTraining in UK in Q3/Q4 of 2011

  - by NeilHambly

  As I prepare to embark on my Immersion training week with Paul & Kimberly from SQLSkills , which is another one of the courses being offered in the UK this year, it seems that these invariably get full very quickly, so don't hang around or you will miss your opportunity to attend them I do know of some other great SQL courses that give you in-depth training and these are the ones that I know of (shown is date order) Sept 12th - 14th (Klaus Aschenbrenner) "Advanced SQL Server Performance...(read more)

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• Oracle Magazine, July/August 2006

  Oracle Magazine July/August 2006 features articles on Oracle Enterprise Manager, Oracle OpenWorld, Green Mountain Coffee Roasters, Retailers, Identity Management, XML, SQL, ODP.NET Performance, Oracle ADF, Oracle Application Express, and much more.

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• Lower SAP Apps Infrastructure Cost w/Oracle Database 11g

  - by john.brust

  Register today for this live webcast to learn about the #1 Database for Deploying SAP Applications. Webcast Date: Tuesday, May 11, 2010 at 9:00am PT or your local time. Oracle Database 11g is now available for SAP applications. By upgrading your SAP applications to Oracle Database 11g Release 2 you can significantly reduce infrastructure costs and improve performance, availability, and security at the same time. Our expert guest will be Gerhard Kuppler, Oracle's Director of SAP Alliances.

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• Free eBooks - SQL Server and other Microsoft Technologies

  - by Greg Low

  Great to see the advice from Gail Erickson about the release of a number of SQL Server related eBooks on the new Microsoft eBook Gallery site. It's good to see this sort of content moving over to eBook formats.The e-books that are currently available include: SQL Server 2012 Transact-SQL DML Reference Master Data Services Capacity Guidelines Microsoft SQL Server AlwaysOn Solutions Guide for High Availability and Disaster Recovery QuickStart: Learn DAX Basics in 30 Minutes Microsoft SQL Server Analysis Services Multidimensional Performance and Operations Guide You'll find details of them here: http://social.technet.microsoft.com/wiki/contents/articles/11608.e-book-gallery-for-microsoft-technologies.aspx

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• Google I/O 2012 - Measuring the End-to-End Value of Your App

  Google I/O 2012 - Measuring the End-to-End Value of Your App Neil Rhodes, Nick Mihailovski, Mike Kwong We've rethought mobile app analytics from the ground up. If you are a mobile app developer, come see what's new from the land of Google Analytics; Understand how to measure the end-to-end value of your app, and improve its performance to drive usage and retention. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 69 4 ratings Time: 01:04:12 More in Science & Technology

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