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• Extended Events demos on Microsoft Virtual Academy

  - by extended_events

  I had an opportunity recently to contribute a presentation to the Microsoft Virtual Academy as part of the Mission Critical Confidence using SQL Server 2012 course offering. The MVA offers you a myriad of free training opportunities, so I encourage anyone who is interested in expanding your knowledge to take advantage of this offering. For those of you who don’t want to invest the time to go through the whole course, you can access my presentation here. I cover the following topics: Integration of Extended Events into AlwaysOn troubleshooting. Troubleshooting Login failures using client/server correlation. Troubleshooting query performance issues using client/server correlation. I’m not sure how long content is made available on MVA, I got the impression that it would be removed as some point in the future, but should be there for at lease several months. - Mike

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• Coherence on Exalogic: 6x Speeds on Half the Hardware is Possible

  - by jeckels

  Recently, Oracle Coherence released its 12c version, focused on scalability and real-time data delivery. As part of the launch, we showcased Coherence's tight coupling with Exalogic Elastic Cloud. By leveraging the Inifiniband Fabric in Exalogic, Coherence can now operate at up to 6x the speed on as little as half the hardware on an Exalogic box. This breakthrough is helping customers save money on their hardware costs while improving performance of their data grid. Here's a free resource available for you to explore this technology relationship further.For even more information on Coherence, attend our upcoming free virtual developer day on November 5th to see how developers can leverage Coherence in their everyday tasks.

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• Just Finished My Presentation at SLO! (Central Coast Code Camp At Cal Poly)

  I love code camps!  This is my first time to San Luis Obispos Central Coast Code Camp and Im really enjoying it.  It started last night with the presenters dinner at a great local steak... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance programming...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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• You Can Deliver an Engaging Online Experience Across All Phases of the Customer Journey

  - by Christie Flanagan

  Engage. Empower. Optimize. Today’s customers have higher expectations and more choices than ever before.  To succeed in this environment, organizations must deliver an engaging online experience that is personalized, interactive and consistent across all phases of the customer journey. This requires a new approach that connects and optimizes all customer touch points as they research, select and transact with your brand.  Oracle WebCenter Sites combines with other customer experience applications such as Oracle ATG Commerce, Oracle Endeca, Oracle Real-Time Decisions and Siebel CRM to deliver a connected customer experience across your websites and campaigns. Attend this Webcast to learn how Oracle WebCenter: Works with Oracle ATG Commerce and Oracle Endeca to deliver consistent and engaging browsing, shopping and search experiences across all of your customer facing websites Enables you to optimize the performance of your online initiatives through integration with Oracle Real-Time Decisions for automated targeting and segmentation Connects with Siebel CRM to maintain a single view of the customer and integrate campaigns across channels Register now for the Webcast.

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• Upgrading a dual-boot system HDD

  - by Jason

  I dual-boot my laptop due to lousy VM performance, and have a new 500GB/7200rpm drive coming in to replace the stock 320GB/5400rpm drive. I have the drive set up in three partitions: one for the Win7 system files, one for storage, and the third as the ext4 Linux file system. The system file and storage partitions are both NTFS. What I'm planning to do is use the system image creator built in Win7, then move that over to the new drive. However, how can I migrate the Ubuntu partition, and how do I make sure that the Grub bootloader isn't overwritten by the Windows loader?

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• Hash Function Added To The PredicateEqualityComparer

  - by Paulo Morgado

  Sometime ago I wrote a predicate equality comparer to be used with LINQ’s Distinct operator. The Distinct operator uses an instance of an internal Set class to maintain the collection of distinct elements in the source collection which in turn checks the hash code of each element (by calling the GetHashCode method of the equality comparer) and only if there’s already an element with the same hash code in the collection calls the Equals method of the comparer to disambiguate. At the time I provided only the possibility to specify the comparison predicate, but, in some cases, comparing a hash code instead of calling the provided comparer predicate can be a significant performance improvement, I’ve added the possibility to had a hash function to the predicate equality comparer. You can get the updated code from the PauloMorgado.Linq project on CodePlex,

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• How to draw unlimited FPS on Mac OS X with OpenGL?

  - by V1ru8

  I d'like to draw as many frames as possible with OpenGL on Mac OS X to measure the performance on different scenes. What I've tried so far: Using a CVDisplayLink that has NSOpenGLCPSwapInterval set to 0, so it does not sync with the Display. But with that it's still stuck at max 60FPS Using normal -drawRect: with a timer that fires 1/1000sec and calls -setNeedsDisplay: Still not more than 60FPS Same as 2. but I call -display in the timer callback. With that I get the FPS above 60, but it still stops at 100-110 FPS. Although the frame rate should easily be at 10times more. Andy idea how I can really draw as many frames as possible?

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• How can I support scrolling when using batched rendering for my tiles?

  - by dardanel

  I have tiled map 100*75 and tiles are 32*32 pixel.I want to use batching for performance .I don't figure it out , because of my game needs scrolling and every frame i draw 22*16 tiles (my screen is 20*16 tile) .I thought that batching tiles for every frame .Is it good or any suggestion? edit :to more clarify I want to use occlusion culling and batching at the same time.I thought that drawing only visible areas and batching them together .But there is a something i couldn't figure out .When scrolling screen with translate matrix , if one row become invisible , I bind new row and batch them again.Every batched objects needs to buffer again.So I batch tiles and buffer to VBO every time when one row become invisible .I don't know these way is efficient or not .This is my question .And i am open to any suggestions.

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• Writing a spell checker similar to "did you mean"

  - by user888734

  I'm hoping to write a spellchecker for search queries in a web application - not unlike Google's "Did you mean?" The algorithm will be loosely based on this: http://catalog.ldc.upenn.edu/LDC2006T13 In short, it generates correction candidates and scores them on how often they appear (along with adjacent words in the search query) in an enormous dataset of known n-grams - Google Web 1T - which contains well over 1 billion 5-grams. I'm not using the Web 1T dataset, but building my n-gram sets from my own documents - about 200k docs, and I'm estimating tens or hundreds of millions of n-grams will be generated. This kind of process is pushing the limits of my understanding of basic computing performance - can I simply load my n-grams into memory in a hashtable or dictionary when the app starts? Is the only limiting factor the amount of memory on the machine? Or am I barking up the wrong tree? Perhaps putting all my n-grams in a graph database with some sort of tree query optimisation? Could that ever be fast enough?

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• Database Insider - June 2014 issue now available

  - by Javier Puerta

  The June issue of the Database Insider newsletter is now available. (Full newsletter here) NEWS June 10: Oracle CEO Larry Ellison Live on the Future of Database Performance At a live webcast on June 10 at Oracle’s headquarters, Oracle CEO Larry Ellison is expected to announce the upcoming availability of Oracle Database In-Memory, which dramatically accelerates business decision-making by processing analytical queries in memory without requiring any changes to existing applications.Read More New Study Confirms Capital Expenditure Savings with Oracle Multitenant A new study finds that Oracle Multitenant, an option of Oracle Database 12c, drives significant savings in capital expenditures by enabling the consolidation of a large number of databases on the same number or fewer hardware resources.  Read More Read full newsletter here

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• Mit Oracle Datenbanken in die Pole-Position!

  - by Alliances & Channels Redaktion

  Stellen Sie sich vor, Sie haben die Wahl zwischen einem hübschen, aber uralten Kleinwagen und einem stylischen Tourenwagen auf technischem Höchststand. Beide haben etwas für sich, keine Frage, doch auf der Rennstrecke, wo es allein um Performance geht, ist Nostalgie fehl am Platz. Nicht anders ist es mit Datenbanken. Wer also Wert auf Leistung, Sicherheit und die optimale Ausnutzung von Hardware und IT-Ressourcen legt, sollte sich für ein Database-Tuning entscheiden. Die wesentlichen Vorteile der Oracle Datenbanken bringt dieses Video kurz und knackig auf den Punkt – und ist damit auch bestens zum Einsatz bei Kunden geeignet. Oracle Database Tuning from Worm Marketing Consulting GmbH on Vimeo.

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• Mit Oracle Datenbanken in die Pole-Position!

  - by Alliances & Channels Redaktion

  Stellen Sie sich vor, Sie haben die Wahl zwischen einem hübschen, aber uralten Kleinwagen und einem stylischen Tourenwagen auf technischem Höchststand. Beide haben etwas für sich, keine Frage, doch auf der Rennstrecke, wo es allein um Performance geht, ist Nostalgie fehl am Platz. Nicht anders ist es mit Datenbanken. Wer also Wert auf Leistung, Sicherheit und die optimale Ausnutzung von Hardware und IT-Ressourcen legt, sollte sich für ein Database-Tuning entscheiden. Die wesentlichen Vorteile der Oracle Datenbanken bringt dieses Video kurz und knackig auf den Punkt – und ist damit auch bestens zum Einsatz bei Kunden geeignet. Oracle Database Tuning from Worm Marketing Consulting GmbH on Vimeo.

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• Are my other partitions safe from harm from an alpha/beta release?

  - by Marcappuccino

  I am quite intrested in testing the latest alpha-3 of Ubuntu, however, performance in VirtualBox is slow and somewhat buggy (I know! It's an Alpha) - guest additions wern't installing, bad mouse intergration, etc. I would now like to test this release on my hard drive. But my main system (12.04) is also on this very same hard drive. Is this safe? Can the alpha touch my main partition? Are there any other risks?

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• A Great Idea I Never Had. Better Elevator Automation, no Buttons in Elevator.

  After my second year at engineering school (Cornell University), I spent the summer working in a dream job as an intern at the world famous Ford Design Center in Dearborn Michigan.  The group I... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance programming...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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• How often should saving to disk occur in an automatically saving text editor?

  - by lelandmiller

  I am developing a simple text editor and would like the application to save the text automatically. In other words, the user would never have to press a save button. I have seen other applications that do this, and was wondering how often is it safe to write files to disk? From a user experience standpoint, it seems that the more frequently this happens the better, but I am worried about performance and possible disk wear (especially on writes to SSDs). It seems like the operating system disk caching might help avoid these problems, but I also don't know if its safe to rely on that for an application like this. I was planning on writing the whole document to disk at each save, but this just seems terribly inefficient if the OS ends up writing it to disk to frequently, but relying on program unload may lose data in the case of a crash. Does anyone have any experience dealing with this that might be able to help?

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• Speaking in Omaha: December 7, 2011

  - by Bill Graziano

  I’m presenting in Omaha on Writing Faster SQL at 6PM on December 7th.  You can find meeting details on the Omaha SQL Server User Group page. The meeting location requires an RSVP so building security has a list of attendees. The presentation is a series of suggestions on improving performance.  It ranges from simple things like comparing indexed columns to scalar values up to tips for reducing query compiles and asynchronous processing patterns.  Nearly all of these come from specific issues I’ve encountered working on poorly performing SQL Servers.

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• GNOME 3.8 stutters / lags

  - by Robin

  I recently installed Fedora 19 beta and noticed unusually laggy behaviour of GNOME Shell (3.8) on the Nouveau driver on a nVidia 9200GS (also with nVidia driver) So I thought this could be related to Fedora so I installed Ubuntu 13.04 which comes with GNOME 3.6. Everything was buttery smooth as it has always been, but once I upgraded GNOME to 3.8, I experience the same laggy performance on Ubuntu as well. I'm talking about the animations, such as the window overview in activities, openSUSE live image with 3.6 = smooth Ubuntu 13.04 live image with 3.6 = smooth Ubuntu 13.04 install with 3.6 = smooth Ubuntu 13.04 install with 3.8 = laggy Fedora live image with 3.8 = laggy Fedora install with 3.8 = laggy Does anyone have a clue what could be going on?

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• Is there benefit to maintain a large project with bad code?

  - by upton

  I'm currently maintain a large project with more than 100000 LOC. The code use the MFC as its framework, in genral, it only has interface part which heavily use the mfc api and a business logic part which full of bad code, confusing logic. The company has some small features delivered to the customer each year(most features are adding code to exisiting project, finding some reference of some api or variable and it' s no different with fixing 3-4 bugs ), most of the tasks are to resove issue and optimize performance . Like other company with maintaining position, it value people who knows much logic about its product. There are people who can quickly finish the job on such project, is it worth to train myself like such a programmer? Is there benifits to work on such project for a long time?

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• SAP ouvre sa plateforme In Memory aux Startups et organise une série d'événements pour construire un écosystème autour d'HANA

  SAP ouvre sa plateforme In Memory aux Startups et organise une série d'événements pour construire un écosystème fiable autour d'HANA SAP organise une série d'événements pour aider les développeurs et startups qui utilisent la plateforme In Memory HANA à tirer parti de celle-ci. SAP HANA (High-Performance Analytic Appliance) permet de produire des environnements de Data Warehouse dopés, qui fournissent des données clients en temps réel. Elle permet également d'animer un réseau en ligne et offre une plateforme ouverte aux développeurs. La société souhaite qu'un écosystème fiable soit construit autour de sa plateforme grâce à son programme de soutien aux startups du monde en...

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• How to get familiar with "what happens underneath of Java"?

  - by FidEliO

  I did not study CS nor IT. I just became a developer, now working with Java. Actually, since I now work with a big company writing high-scalable web applications, I think I need to be better with details. I have no understanding of what happens underneath of Java. Java Performance, Server-Side Java might be the buzz words?!! I am very poor with those more of low-level details but I do not know where to look honestly. I started looking for some keywords in Amazon, ended up reading books like "pragmatic programmer", "clean code", "code complete" which IMO they are not what I am looking for. Could you please give me some learning resources (books, articles, blog posts, online trainings) for this matter? I also read this post as well: Approaching Java/JVM internals But I think I need a pre-step before jumping into the OpenJDK, right?!

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• Alternative Web model

  - by Above The Gods

  One of the problems web apps have against native apps, especially on the mobile front, is the constant need to re-download each web page on request. Ultimately, this leads to slower performance. Why if web apps only download new pages if they're actually needed, not because they're simply requested. For example: perhaps the server can store a web page version in a cookie. Every slight change to the page on the server-side changes the version number. Now instead of the browser requesting a new page each time, why not just check the version number and have the server send the page if they're different? If the page similar, the user can just use a cached page. I'm sure browsers doesn't necessarily have to change to accommodate changes to this, correct?

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• Which specific programming activities do women, on average, perform better than men? [closed]

  - by blueberryfields

  Following a recent discussion with female associates in hiring positions for software development/engineering positions, I found out that this kind of information would be incredibly useful to helping make sure that the workforce shows a gender balance. So I went looking. I've found various literature speaking about risk-taking behaviour and patterns, and other statistical differences between men and women when it comes to work performance. See for example this article related to hedge fund management. I have yet to see any such comparison in the computing field. To restate the question: Which specific programming activities do women, on average, perform better than men? Please back up your answers with specific details, preferably by linking to relevant research or, failing that, explaining what you're basing the information on.

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• Radeon HD4850 card, ubuntu 12.04.1 LTS Installed FGLRX drivers, but still running vesa, how to solve it?

  - by user113416

  I have ati HD4850 card, ubuntu 12.04.1LTS. To begin with, after fresh instll, i installed fglrx drvers from system -- additional drivers, according to fglrxifo everything was alright, but the system was running on vesa:sem. After that, i have reinstalled and installed drivers according to many tutorials, but stille got that problem. one of the tutorial was here: What is the correct way to install ATI Catalyst Video Drivers (fglrx)? of course, i attempted to install 12.6 driver Now i have a fresh install of ubuntu and don't want to touch anything without anyone's support, because my 3 days nightmare didn't give results. what must i do to have an adequate performance of video card? Thanks in advace.

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• Getting Started with Oracle Fusion Project Portfolio Management

  Designed from the ground-up using the latest technology advances and incorporating the best practices gathered from Oracle's thousands of customers, Fusion Applications are 100 percent open standards-based business applications that set a new standard for the way we innovate, work and adopt technology. Delivered as a complete suite of modular applications, Fusion Applications work with your existing portfolio to evolve your business to a new level of performance. In this AppCast, part of a special series on Fusion Applications, you hear about the unique advantages of Fusion Project Portfolio Management, learn about the scope of the first release and discover how Fusion PPM modules can be used to complement and enhance your existing Projects solutions.

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• Sortie de PostgreSQL 9.2 en version finale : performances et extensibilité accrues, flexibilité orientée développeurs

  Le PostgreSQL Global Development Group annonce la sortie de PostgreSQL 9.2, dernière version en date du système de gestion de bases de données libre de référence. Depuis l'annonce de la version bêta en mai, les développeurs et les intégrateurs louent les avancées en terme de performance, de flexibilité et d'extensibilité. Ils s'attendent à une adoption massive de cette version. [IMG]http://scheu.developpez.com/tutoriels/postgresql/log-shipping/images/logo-pgsql.png[/IMG] « PostgreSQL 9.2 intègre le support natif de JSON, les index couvrants, des performances et une réplication encore améliorées, et beaucoup d'autres fonctionnalités. Nous attendons cette version avec impatience. Elle sera disponible en "Early Access" dès sa...

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