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• SQLAuthority News Training and Consultancy and Travel Story of 30 Last 30 Days

  Today’s blog post is not technical as usual. Here, I present a real story, and I also invite you all to share your thoughts or opinions on this post. I am a professional SQL Server Trainer; I also do consultation in the area of the Performance Tuning and Query Optimizations. In any month, I like [...]...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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• New perspectives in a SPARC/virtualization/cloud session at the Oracle OpenWorld

  - by Karoly Vegh

  Attending Oracle OpenWorld? You definitely should.  If you do, come see me at the "Breakthrough in Private Cloud Management on SPARC T-Series Servers" session on Wednesday at 11:45 in Moscone South 270, the right session to get the consolidation discussion running at lunch :)  I am of course going to talk about Oracle VM for SPARC (former LDoms), the performance overhead impact of virtualization, the importance of data security in the cloud, instance separation and the open potentials of verified platform and cost savings.  For more details:  https://oracleus.activeevents.com/connect/sessionDetail.ww?SESSION_ID=2590 See you there! 

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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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• Is there benifit 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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• Le W3C publie le standard EXI, une nouvelle norme qui étend la portée du XML aux applications et terminaux mobiles

  Le W3C publie le standard EXI Une nouvelle norme qui étend la portée du XML aux applications et terminaux mobiles Le W3C (World Wide Consortium) vient de publier une nouvelle norme compacte du XML (eXtensible Markup Language) qui sera utilisée sur les terminaux mobiles et autres appareils ayant des contraintes de mémoire et/ou de bande passante. Le nouveau standard EXI (Efficient XML Interchange) a pour but d'optimiser nettement la performance, l'efficacité réseau et la consommation d'énergie des applications utilisant XML. Le standard XML est largement utilisé en tant que format d'échange de données entre différents systèmes, services Web et appareils. Mais il n'est pas adopté su...

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• Introducing Next-Generation Enterprise Auditing and Database Firewall Platform Webcast, 12/12/12

  - by Troy Kitch

  Join us, December 12 at 10am PT/1pm ET, to hear about a new Oracle product that monitors Oracle and non-Oracle database traffic, detects unauthorized activity including SQL injection attacks, and blocks internal and external threats from reaching the database. In addition, this new product collects and consolidates audit data from databases, operating systems, directories, and any custom template-defined source into a centralized, secure warehouse. This new enterprise security monitoring and auditing platform allows organizations to quickly detect and respond to threats with powerful real-time policy analysis, alerting and reporting capabilities. Based on proven SQL grammar analysis that ensures accuracy, performance, and scalability, organizations can deploy with confidence in any mode. You will also hear how organizations such as TransUnion Interactive and SquareTwo Financial rely on Oracle today to monitor and secure their Oracle and non-Oracle database environments. Register for the webcast here.

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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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• Remote Diagnostic Agent (RDA) version 4.30

  - by inowodwo

  posted by Maurice Bauhahn Remote Diagnostic Agent (RDA) version 4.30 was released on December 11th A free download can be accessed via Knowledge Management article 314422.1 and installed in any Enterprise Performance Management 11.1.2.x environment. EPM-specific instructions are available in Knowledge Management article 1304885.1. This RDA version incorporates two new modules (EAS=Essbase Administration Services; HWA=Hyperion Web Analysis) and improvements in modules and profiles relating to twelve other Hyperion applications (EPM, EPMA, ESS, FCM, HFM, HFR, HIR, HPL, HPSV, HSS, PR, and HSV). To follow best practice, run related RDA profiles [for example: "perl rda.pl -vnSCRPp Hyperion1112_EAS"] and attach the output zip file [by default in \rda\output\] to your service requests. The comprehensive set of details provided in such output files should help technicians to avoid delays in handling service requests (by avoiding ping-pong communications resulting from repeated requests for additional values).

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• The final set of SQLBits videos has been uploaded

  - by simonsabin

  The final set of SQLbits videos has been uploaded to the site. You can either watch online or download them. Some highlights of sessions that have been uploaded are Lies, Damned Lies And Statistics. Making The Most Out of SQL Server Statistics attend this session to understand exactly how the optimiser decides on its plans SSIS Dataflow Performance tuning Need to eek out a bit more oomph from your dataflows. This session might be of some use. TSQL Techniques – Why and how to tune a routine an overview...(read more)

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• arrays format (Javascript)

  - by João Melo

  i have a list of users, with minions, something like this: User52: minion10 minion12 User32: minion13 minion11 i've been keeping in an array where the "location" is the id, like this: Users: [52]User minions: [10]minion [12]minion [32]User minions: [13]minion [11]minion so i can access them easily like this: user[UserID].minions[MinionID] (ex: user[32].minions[11]) but when i print it or send it by json i get something like this: {,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,minion,,,,,,,,,,,,,,minion} but should i keep using like this or should i change to something like this: User = function(){ this.minions = ...; this.getMinion = function(value){ for(var m in this.minions){ if(this.minions[m].id == value){ return this.minions[m]; break; } } } } and get it like this: user.getMinion(MinionID); Question: i get better performance using a "short" array but using loops every time i need a minion, or using "long" arrays, but no need for loop and getting values directly from the id "name"?

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• Will 3D games run in a VirtualBox4-hosted Windows system under Ubuntu with Intel GMA X4500HD card?

  - by Ivan

  I've just got a laptop with Intel GMA X4500HD card (which is said to be DirectX10-compliant, while my previous laptop had Intel 82852/855GM and no chance to play modern 3D games at all). It would be nice if I could play some games (like HalfLife 2, StarCraft 2, Fallout 3) from time to time (while I am ok using lo-fi settings and having low performance) but as I strongly prefer Ubuntu environment and don't need Windows usually I'd like to install Windows inside VirtualBox instead of using a dedicated partition and dual-boot. So the question is if VirtualBox can use 3D acceleration of Intel GMA X4500HD if run on Ubuntu.

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• XNA Spritebatch sorting by texture vs depth

  - by Motig

  I am refining my 2D game engine, and I want to look in to sorting sprite batches by texture (because I'm quite often using the same textures repeatedly). However, I also want to retain a few 'layers' of depth (i.e. ground < buildings < units < GUI etc). My question is, which of the following is the best approach (in terms of performance)? Create multiple SpriteBatches and Begin() and End() them in order; or... Create a single SpriteBatch and call Begin() and End() multiple times, once for each layer (in order)?

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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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• Password Authentication Problems

  - by Bobby Hathorn

  I am new to Ubuntu, am extremely delighted with the performance and speed, as compared to Windows 7-However, I messed up, I think...when I booted my USB disc, I set a password, as directed, and when Ubuntu booted up I tried to reset my password via User Accounts to "None". Now, the Password Authentication window prevents me from downloading software, (Audacity and my Ubuntu updates. Also, I've tried to boot into GRUB and the Recovery Console, as directed; however, the PC bypasses GRUB and boots into Ubuntu instead. Also, when attempting to use the terminal as directed to change the password, I'm given a password prompt there also. If the problem is on my end, could you email/reset my password? My PC is an emachines EL1358G. I am otherwise happy with Ubuntu!

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• Does Ubuntu 12.04 supports for B75 boards?

  - by rail02000

  I want to build a new computer with Intel G840 CPU and Gigabyte B75M-D3H motherboard and install Ubuntu (or Kubuntu) 12.04 64bit on it. However, I'm worried about whether the chip is too new and whether that Linux Kernel now has support for it. According to the article [Phoronix] Intel Core i7 3770K Ivy Bridge Linux Performance Review ,the Linux kernel is ready to work on the chip. Existing Intel Sandy Bridge motherboards/chipsets are compatible with Ivy Bridge processors, but earlier this month Intel launched the new Panther Point chipsets that are already compatible with Linux too: the B75, H77, Z75, Z77, HM75, HM76, UM77, and HM77. But I didn't find further information or cases about running Ubuntu on the chip. So,is it OK to run Ubuntu on the board? Do I need to upgrade the kernel to a newer version (3.4 or 3.5 etc.) to get the system more smoothly? Or should I choose boards with H61 chip? Thank for your response!

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• Using Visual Studio 2010s Debugger PIN Feature

  One of the very cool new features in Visual Studio 2010 is the ability to Pin a variable you are watching, right in the place you want to see it.  Its always been a hassle to have to add a... 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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• AMD Catalyst Beta Open Source Drivers

  - by FourZer0

  I'm a gamer with a pretty low-end computer, so I always update to the beta drivers to squeeze out every bit of performance I can get. I currently have 13.3 installed, but I want to install the 14.6 beta. I want to use the open source version, instead of downloading from AMD's website. How can I do that in the terminal? And please explain what the commands mean so I can do it on my own in the future. Thanks in advance!

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• Choices in Architecture, Design, Algorithms, Data Structures for effective RDF Reasoning and Querying in a Big Data Environment [on hold]

  - by user2891213

  As part of my academic project I would like to know what choices in Architecture, Design, Algorithms, Data Structures do we need in order to provide effective and efficient RDF Reasoning and Querying in a Big Data Environment. Basically I want to get info regarding below points: What are the Systems and Software to get appropriate Architecture? What kind of API layer(s) would we need on top of the Big Data stores, to make this possible? The Indexing structures we will need. The appropriate Algorithms, and appropriate Algorithms for Query Planning across Big Data stores. The Performance Analysis and Cost Models we will need to justify the design decisions we have made along the way. Can anyone please provide pointers.. Thanks, David

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• How long till HTML5 canvas becomes a viable game development platform?

  - by Shouvik

  So I have been working on web application. So invariably what it boils down to is making simple games which were previously based on flash or openGL. Now I know apple was moving away from flash because its proprietary unlike their stance that its got "pathetic performance"! Not true, try playing a canvas game, I can assure you at any point of time (including when its idle) it will use up a fair bit of processing power just to redraw the UI. Now I do understand that this is my fault because when the game is not active I should not be redrawing the canvas, but honestly its a lot of work and I suppose there should be libraries which should be able to assist me with that! So, how much will it be before I see a decent canvas library which handles these "tiny" issues for me? I can't honestly expect Steve Jobs to be doing anything more for HTML5! I someone knows of a good library, I am all ears...! :) PS: I use mootools and am presently using Mootools Canvas Library.

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• Database Insider - September 2012 issue

  - by Javier Puerta

  The September issue of the Database Insider newsletter is now available. (Full newsletter here) IT ROI CENTER - Oracle Exadata IT ROI Center: Next Steps for Transforming Your BusinessVisit Oracle’s IT ROI Center to discover how customers are using Oracle Exadata to improve efficiency, increase service levels, raise employee productivity, and enable faster time to market—all with lower IT costs CUSTOMER BUZZ 30 Times Performance Improvement at P&G with Oracle Exadata BNP Paribas Runs Global Trading 17 Times Faster with Oracle Exadata Banco Santander (Brasil) S.A. Transforms Data Center with Oracle Exadata FEATURED TRAINING On Demand Training: Oracle Exadata Database Machine Learn about Oracle Exadata Database Machine today using Oracle University’s video streaming training on demand. View a free sample video of the Oracle Exadata Database Machine course. 

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• ReSharper 5.0 Adds New Add Parameter Refactoring

  In this post, Ill show a simple example of how when you add a parameter to C# method, ReSharper gives you a simple prompting to ask if you want to add a parameter to your method, or create an... 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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• FxCop ... Where have you been all my life?

  - by PhilSando

  I was recently introduced to microsoft's tool that analyzes managed code assemblies called FxCop. It points out possible design, localization, performance, and security improvements against a pre defined set of rules (and also accepts custom rules). At first I was unsure how to go about using it as it seems to be aimed at software developers (.exe and .dll) . Its easy to get around this with the following steps: 1)Create a new folder (i.e C:\Code Analysis) 2)Publish your web application into the new folder 3)Open FxCop and add all the dll files from the newly created bin folder  to be scrutinized. Lots more info / docs available here on msdn and you can also download fxcop free

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• Viewing VMware Counters in PerfMon for SQL Server

  I want to ensure that my SQL Server on a VMware Guest OS is getting the resources it should. This would go a long way towards helping isolate the performance problems we're experiencing. However, our system administrators won't give us access to VirtualCenter or any of the tools they use. Is there anything I can do? Check out this tip to learn more. ‘The Case of the Missing Index’Discover the Top 5 hard-earned lessons of a DBA, presented by The DBA Team. Learn from lesson one now.

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• Oracle Solaris Preflight Applications Checker 11.2 now available

  - by CarylTakvorian-Oracle

  ISV Engineering is happy to announce the release of the latest version of our Solaris Preflight Checker tool supporting Solaris 11.2. which is now available for download. The Solaris Preflight Checker enables a developer to determine the Oracle Solaris 11.2 readiness of an application by analyzing a working application on Oracle Solaris 10. A successful check with this tool will be a strong indicator that an application will run unmodified on the latest Oracle Solaris 11.This release includes: Updated symbol database which will help migration from Solaris 10 to Solaris 11.2 Kernel binary and source scanners that now detects, usage of "data structures" changed between Solaris 10 and Solaris 11.2 An application analyzer, which looks for usage of specific Solaris features and recommends better ways of implementing the same on Solaris 11.2   e.g. suitability of high performance libraries shipped with Solaris, crypto offload for Java & C based applications,  etc. And bug fixes

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• Tweaking Hudson memory usage

  - by rovarghe

  Hudson 3.1 has some performance optimizations that greatly reduces its memory footprint. Prior to this Hudson used to always hold the entire data model (all jobs and all builds) in memory which affected scalability. Some installations configured heap sizes in excess of 1GB to counteract this. Hudson 3.1.x maintains an MRU cache and only loads jobs and builds as they are required. Because of the inability to change existing APIs and be backward compatible with plugins, there were limits to how far we could go with this approach. Memory optimizations almost always come with a related cost, in this case its additional I/O that has to be performed to load data on request. On a small site that has frequent traffic, this is usually not noticeable since the MRU cache will usually hold on to all the data. A large site with infrequent traffic might experience some delays when the first request hits the server after a long gap. If you have a large heap and are able to allocate more memory, the cache settings can be adjusted to take advantage of this and even go back to pre-3.1 behavior. All the cache settings can be passed as options to the JVM container (Tomcat or the default Jetty container) using the -D option. There are two caches, independant of each other, one for Jobs and the other for Builds. For the jobs cache: hudson.jobs.cache.evict_in_seconds ( default=60 ) Seconds from last access (could be because of a servlet request or a background cron thread) a job should be purged from the cache. Set this to 0 to never purge based on time. hudson.jobs.cache.initial_capacity ( default=1024 ) Initial number of jobs the cache can accomodate. Setting this to the number of jobs you typically display on your Hudson landing page or home page will speed up consecutive access to that page. If the default is too large you may consider downsizing and using that memory for the Builds cache instead. hudson.jobs.cache.max_entries ( default=1024) Maximum number of jobs in the cache. The default is large enough for most installations, but if you find I/O activity when always accessing the hudson home page you might consider increasing this, but first verify if the I/O is caused by frequent eviction (see above), rather than by the cache not being large enough. For the builds cache: The builds cache is used to store Build objects as they are read from storage. Typically this happens when a user drills down into the details of a particular Job from the hudson hom epage. The cache is shared among builds for different jobs since in most installations all jobs are not accessed with the same frequency, so a per-job builds cache would be a waste of memory. hudson.job.builds.cache.evict_in_seconds ( default=60 ) Same as the equivalent Job cache, applied to Build. hudson.job.builds.cache.initial_capacity" ( default=512 ) Same as equivalent Job cache setting. Note the smaller initial size. If your site stores a large number of builds and has frequent access to more builds you might consider bumping this up. hudson.job.builds.cache.max_entries ( default=10240 ) The default max is large enough for most installations, the builds cache has bigger sized objects, so be careful about increasing the upper limit on this. See section on monitoring below. Sample usage: java -jar hudson-war-3.1.2-SNAPSHOT.war -Dhudson.jobs.cache.evict_in_seconds=300 \ -Dhudson.job.builds.cache.evict_in_seconds=300 Monitoring cache usage The 'jmap' tool that comes with the JDK can be used to monitor cache performance in an indirect way by looking at the number of Job and Build objects in each cache. Find the PID of the hudson instance and run $ jmap -histo:live <pid | grep 'hudson.model.*Lazy.*Key$' Here's a sample output: num #instances #bytes class name 523: 28 896 hudson.model.RunMap$LazyRunValue$Key 1200: 3 96 hudson.model.LazyTopLevelItem$Key These are the keys to the Jobs (LazyTopLevelItem$Key) and Builds (RunMap$LazyRunValue$Key) in the caches, so counting the number of keys is a good indicator of the number of items in the cache at any given moment. The size in bytes can be ignored, they are just the size of the keys, not the actual sizes of the objects they hold. Those sizes can only be obtained with a profiler. With the output above we can conclude that there are 3 jobs and 28 builds in memory. The 28 builds can all be from 1 job or all 3 jobs. Over time on an idle system, these should get evicted and memory cache should be empty. In practice, because of background cron threads and triggers, jobs rarely fall down to zero. Access of a job or a build by a cron thread resets the eviction timer.

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