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  • SEO Techniques to Be Used by Every Website

    Search engine optimization is the buzz word in the world of internet. Every website wants to rank high in the search engine listings. There are different techniques and measures that you can take up for the process of search engine optimization. Here are some sure shot techniques that every website should apply in order to rank high.

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  • SQL Saturday #323 - Paris

    On September 13, 2014 the French SQL Server Community (GUSS) will be holding a SQL Saturday conference. The event is free to attend, with 4 paid-for pre-conference sessions available. Register while space is available. FREE eBook – "45 Database Performance Tips for Developers"Improve your database performance with 45 tips from SQL Server MVPs and industry experts. Get the eBook here.

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  • Getting Started with Columnstored Index in SQL Server 2014 – Part 2

    Column Store Index, which improves performance of data warehouse queries several folds, was first introduced in SQL Server 2012. Though it had several limitations, now SQL Server 2014 enhances the columnstore index and overcomes several of the earlier limitations. In this article, Arshad Ali discusses how you can get started using the enhanced columnstore index feature in SQL Server 2014 and do some performance tests.

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  • SQLServerCentral Best Practices Clinic: Part 4

    In this next installment looking at implementing best practices here at SQLServerCentral, Brad McGehee looks at a few performance counters and what they tell us about the performance of our database server. The Future of SQL Server Monitoring "Being web-based, SQL Monitor enables you to check on your servers from almost any location" Jonathan Allen.Try SQL Monitor now.

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  • OVERVIEW ORACLE SALES PLAYS

    - by michaela.seika(at)oracle.com
    As an EMEA VAD partner, please update your knowledge on Oracle's Hardware and Software Solutions. Please join us at one of the following WebConferences and sent us a short mail for your registration: Tuesday, 15. February 2011 Sales Play 1: Overview of the High Impact Sales Plays - SALES Thursday, 17. February 2011 Sales Play 2: High Impact Sales Plays - TECHNICAL Further information: Database Application Acceleration with Flash Storage  Oracle's Sun Hardware Solutions

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  • Take the Oracle Database Assessment for Midsize Businesses and Enterprise Departments

    - by David Swanger
    Midsize businesses and enterprise departments often face the dual challenge of having to ensure 24x7 availability while operating with limited resources.  Take this assessment to see how your organization stacks up in terms of simplicity, reliability, and affordability.  And find out how the Oracle Database Appliance helps midsize businesses balance the challenge of high availability and limited resources by simplifying deployment, maintenance, and support of high-availability database workloads. Visit this link to take the assessment: http://www.oracle.com/us/media/survey/index-dbapp-1518659.html

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  • SQLbits London 2012 - Demos

    - by Adam Machanic
    Thanks to everyone who attended my sessions last Friday and Saturday at SQLbits! It was great to meet many new people, not to mention spending some time exploring one of my favorite cities, London. Attached are the demos for each of the two talks I delivered: Query Tuning Mastery: The Art of and Science of Manhandling Parallelism As a database developer, your job boils down to one word: performance. And in today's multi-core-driven world, query performance is very much determined by how well you're...(read more)

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  • lowering the use of the memory controller in OpenCL based applications

    - by user827992
    With my first experiments I noticed that OpenCL is a good technology but often hampered by the X86 architecture and finding a mid-range VGA driven by a low-end chipset is not that unusual in the real world scenarios, sometimes this can happen with some high-end VGA too. Are there some caching techniques? Something that can bypass this inconvenience in some ways. The amount of dedicated memory on today's VGA is usually high, it's possible to use this memory to create some kind of buffer with instructions.

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  • Consolidating Oracle E-Business Suite R12 on Oracle's SPARC SuperCluster

    - by Giri Mandalika
    An Optimized Solution for Oracle E-Business Suite (EBS) R12 12.1.3 is now available on oracle.com.     The Oracle Optimized Solution for Oracle E-Business Suite This solution was centered around the engineered system, SPARC SuperCluster T4-4. Check the business and technical white papers along with a bunch of relevant useful resources online at the above optimized solution page for EBS. What is an Optimized Solution? Oracle's Optimized Solutions are designed, tested and fully documented architectures that are tuned for optimal performance and availability. Optimized solutions are NOT pre-packaged, fully tuned, ready-to-install software bundles that can be downloaded and installed. An optimized solution is usually a well documented architecture that was thoroughly tested on a target platform. The technical white paper details the deployed application architecture along with various observations from installing the application on target platform to its behavior and performance in highly available and scalable configurations. Oracle E-Business Suite R12 Use Case Multiple E-Business Suite R12 12.1.3 application modules were tested in this optimized solution -- Financials (online - oracle forms & web requests), Order Management (online - oracle forms & web req uests) and HRMS (online - web requests & payroll batch). The solution will be updated with additional application modules, when they are available. Oracle Solaris Cluster is responsible for the high availability portion of the solution. Performance Data For the sake of completeness, test results were also documented in the optimized solution white paper. Those test results are mainly for educational purposes only. They give good sense of application behavior under the circumstances the application was tested. Since the major focus of the optimized solution is around highly available and scalable configurations, the application was configured to me et those criteria. Hence the documented test results are not directly comparable to any other E-Business Suite performance test results published by any vendor including Oracle. Such an attempt may lead to skewed, incorrect conclusions. Questions & Requests Feel free to direct your questions to the author of the white papers. If you are a potential customer who would like to test a specific E-Business Suite application module on any non-engineered syste m such as SPARC T4-X or engineered system such as SPARC SuperCluster, contact Oracle Solution Center.

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  • PowerPivot FILTER condition optimizations

    - by Marco Russo (SQLBI)
    In the comments of a recent post from Alberto Ferrari there was an interesting note about different performance related to the order of conditions in a FILTER call. I investigated about that and Jeffrey Wang has been so nice to give me some info about actual implementation that I can share on a blog post. First of all, an important disclaimer: PowerPivot is intended to make life easier, not requiring the user to think how to write the order of elements in a formula just to get better performance....(read more)

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  • APress Deal of the Day 4/Jan/2011 - Pro SQL Server 2008 Mirroring

    - by TATWORTH
    Todays Apress $10 deal of the day at http://www.apress.com/info/dailydeal is "Pro SQL Server 2008 Mirroring is your complete guide to planning, using, deploying, and maintaining database mirroring as a high-availability option. Mirroring protects you by maintaining one or more duplicate copies of your database for use in the event the primary copy is damaged. It is a key component of any production-level, high-availability solution. This book covers the full spectrum of database mirroring, taking you from the planning phase through the implementation to the maintenance phase and beyond."

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  • SIMD Extensions for the Database Storage Engine

    - by jchang
    For the last 15 years, Intel and AMD have been progressively adding special purpose extensions to their processor architectures. The extensions mostly pertain to vector operations with Single Instruction, Multiple Data (SIMD) concept. The reasoning was that achieving significant performance improvement over each successive generation for the general purpose elements had become extraordinarily difficult. On the other hand, SIMD performance could be significantly improved with special purpose registers...(read more)

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  • Java Hashed Collections

    The Java collections framework contains classes you use to maintain collections of other objects. These collection classes have different performance and ordering properties. See how the HashMap and HashSet Classes allow objects to be added to a collection, removed from a collection, or found in roughly constant time. Discover how to use these classes and what to do to achieve good performance from them.

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  • Getting started with tuning your SOA/BPM database using AWR

    - by Mark Nelson
    In order to continue to get good performance from your SOA or BPM 11g server, you will want to periodically check your database – the one you are storing your SOAINFRA schema in – to see if there are any performance issues there. This article provides a very brief introduction to the use of the Automatic Workload Repository (AWR) in the Oracle Database and what to look for in the reports for your SOA/BPM environment. READ MORE >>

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  • Wrong statistics in AUX_STATS$ might puzzle the optimizer

    - by Mike Dietrich
    We do recommend the creation of System Statistics for quite a long time. Since Oracle 9i the optimizer works with a CPU and IO cost based model. And in order to give the optimizer some knowledge about the IO subsystem's performance and throughput - once System Statistics are collected - they'll get stored in AUX_STATS$. For this purpose in the old Oracle 9i days some default values had been defined - and you'll still find those defaults in Oracle Database 11g Release 2 in AUX_STATS$. But these old values don't reflect the performance of modern IO systems. So it might be a good best practice post upgrade to create fresh System Statistics if you haven't done this before.  You can collect System Statistics with: exec DBMS_STATS.GATHER_SYSTEM_STATS('start'); and end it later by executing: exec DBMS_STATS.GATHER_SYSTEM_STATS('stop'); You could also run DBMS_STATS.GATHER_SYSTEM_STATS('interval', interval=>N) instead where N is the number of minutes when statistics gathering is stopped automatically. Please make sure you'll do this on a real workload period. It won't make sense to gather these values while the database is in an idle state. You should do this ideally for several hours. It doesn't affect performance in a negative way as the values are anyway collected in V$SYSSTAT and V$SESSTAT. And in case you'd like to delete the stats and revert to the old default values you'd simply execute:exec DBMS_STATS.DELETE_SYSTEM_STATS; The tricky thing in Oracle Database 11.2 - and that's why I'm actually writing this blog post today - is bug9842771. This leads to wrong values in AUX_STATS$ for SREADTIM and MREADTIM by factor 1000 guiding the optimizer sometimes into the totally wrong directon. The workaround is to overwrite these values manually and divide them by 1000. Use the DBMS_STATS.SET_SYSTEM_STATS procedure. See this MOS Note:9842771.8 for the above bug for some further information. This issue is fixed in Oracle Database 11.2.0.3 and above. To get some background information about the statistics collected in please read this section in the Oracle Database 11.2 Performance Tuning Guide. And gathering System Statistics might have some implication if you have mixed workloads - and interacts with DB_FILE_MULTIBLOCK_READ_COUNT. For more information please read section 13.4.1.2.

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  • 4.8M wasn't enough so we went for 5.055M tpmc with Unbreakable Enterprise Kernel r2 :-)

    - by wcoekaer
    We released a new set of benchmarks today. One is an updated tpc-c from a few months ago where we had just over 4.8M tpmc at $0.98 and we just updated it to go to 5.05M and $0.89. The other one is related to Java Middleware performance. You can find the press release here. Now, I don't want to talk about the actual relevance of the benchmark numbers, as I am not in the benchmark team. I want to talk about why these numbers and these efforts, unrelated to what they mean to your workload, matter to customers. The actual benchmark effort is a very big, long, expensive undertaking where many groups work together as a big virtual team. Having the virtual team be within a single company of course helps tremendously... We already start with a very big server setup with tons of storage, many disks, lots of ram, lots of cpu's, cores, threads, large database setups. Getting the whole setup going to start tuning, by itself, is no easy task, but then the real fun starts with tuning the system for optimal performance -and- stability. A benchmark is not just revving an engine at high rpm, it's actually hitting the circuit. The tests require long runs, require surviving availability tests, such as surviving crashes -and- recovery under load. In the TPC-C example, the x4800 system had 4TB ram, 160 threads (8 sockets, hyperthreaded, 10 cores/socket), tons of storage attached, tons of luns visible to the OS. flash storage, non flash storage... many things at high scale that all have to be perfectly synchronized. During this process, we find bugs, we fix bugs, we find performance issues, we fix performance issues, we find interesting potential features to investigate for the future, we start new development projects for future releases and all this goes back into the products. As more and more customers, for Oracle Linux, are running larger and larger, faster and faster, more mission critical, higher available databases..., these things are just absolutely critical. Unrelated to what anyone's specific opinion is about tpc-c or tpc-h or specjenterprise etc, there is a ton of effort that the customer benefits from. All this work makes Oracle Linux and/or Oracle Solaris better platforms. Whether it's faster, more stable, more scalable, more resilient. It helps. Another point that I always like to re-iterate around UEK and UEK2 : we have our kernel source git repository online. Complete changelog of the mainline kernel, and our changes, easy to pull, easy to dissect, easy to know what went in when, why and where. No need to go log into a website and manually click through pages to hopefully discover changes or patches. No need to untar 2 tar balls and run a diff.

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  • How do I maintain a really poorly written code base?

    - by onlineapplab.com
    Recently I got hired to work on existing web application because of NDA I'm not at liberty to disclose any details but this application is working online in sort of a beta testing stage before official launch. We have a few hundred users right now but this number is supposed to significantly increase after official launch. The application is written in PHP (but it is irrelevant to my question) and is running on a dual xeon processor standalone server with severe performance problems. I have seen a lot of bad PHP code but this really sets new standards, especially knowing how much time and money was invested in developing it. it is as badly coded as possible there is PHP, HTML, SQL mixed together and code is repeated whenever it is necessary (especially SQL queries). there are not any functions used, not mentioning any OOP there are four versions of the app (desktop, iPhone, Android + other mobile) each version has pretty much the same functionality but was created by copying the whole code base, so now there are some differences between each version and it is really hard to maintain the database is really badly designed, which is causing severe performance problems also for fixing some errors in PHP code there is a lot of database triggers used which are updating data on SELECT and on INSERT so any testing is a nightmare Basically, any sin of a bad programming you can imagine is there for example it is not only possible to use SQL injections in literally every place but you can log into app if you use a login which doesn't exist and an empty password. The team which created this app is not working on it any more and there is an outsourced team which suggested that there are some problems but was never willing to deal with the elephant in the room partially because they've got a very comfortable contract and partially due to lack of skills (just my opinion). My job was supposed to be fixing some performance problems and extending existing functionality but first thing I was asked to do was a review of the existing code base. I've made my review and it was quite a shock for the management but my conclusions were after some time finally confirmed by other programmers. Management made it clear that it is not possible to start rewriting this app from scratch (which in my opinion should be done). We have to maintain its operable state and at the same time fix performance errors and extend the functionality. My question is, as I don't want just to patch the existing code, how to transform this into properly written app while keeping the existing code working at the same time? My plan is: Unify four existing versions into common code base (fixing only most obvious errors). Redesign db and use triggers to populate it with data (so data will be maintained in two formats at the same time) All new functionality will be written as separate project. Step by step transfer existing functionality into the new project After some time everything will be in the new project Some explanation about #2, right now it is practically impossible to make any updates in existing db any change requires reviewing whole code and making changes in many places. Is such plan feasible at all? Another solution is to walk away and leave the headache to someone else.

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  • Is it recommended to apply the new said-great 200 line Linux kernel path to Ubuntu?

    - by takpar
    Hi, Nowadays I'm hearing a lot about the new ~200 line path to Linux kernel that is said makes sensible difference in performance. Now, do anyone has experience on applying this path on his Ubuntu kernel? I also saw an alternative way that claimed has a better result: wget http://launchpadlibrarian.net/59511828/cgroup_patch chmod +x cgroup_patch sudo ./cgroup_patch What do you think this is? Is this validated? I ask this question because I need more performance but I can't risk on stability.

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  • Crystal Reports: 3 New Uses For Sub Reports

    I hate sub reports and always consider them the last resort in any reporting solution. The negative effect on performance and maintainability is just not worth the easy ride they give the report writer. Nine times out of ten reporting requirements can be met using a little forethought and planning (and a solid understanding of formulas). With that said, there are a few novel ways of using sub reports which will not affect performance and actually prove a boon to the developer.

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  • [Speaking] Presenting at AITP Region 18 IT Con

    - by AllenMWhite
    The IT Con event this Saturday, June 18, is an event similar to SQL Saturday. It has three tracks, an IT Professional track, a Development track and a Career Development track. I'll be presenting two sessions in the IT Professional track. Gather SQL Server Performance Data with PowerShell We all know how important it is to keep a baseline of performance metrics that allow us to know when something is wrong and help us to track it down and fix the problem. We don't always know how to do this easily...(read more)

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  • Improving Finance Department Productivity at BorgWarner

    Nigel Youell, Product Marketing Director, Enterprise Performance Management Applications at Oracle discusses with Mark Smith, Manager, Financial Reporting Systems at BorgWarner how using Oracle's Enterprise Performance Management System on top of SAP transactional systems at BorgWarner has made significant improvements in the productivity of it finance function and halved the time it takes for to close its books.

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  • Fin de LINQ to HPC : Microsoft abandonne sa plateforme de traitement de gros volumes de données pour son concurrent Hadoop

    Fin de LINQ to HPC : Microsoft abandonne sa plateforme de traitement de gros volumes de données pour se concentrer sur le support de son concurrent Hadoop Microsoft abandonne LINQ to HPC (High performance computing), nom de code Dryad, sa propre plateforme haute performance pour des calculs distribués et la gestion intensive des données, pour se concentrer sur le support de son concurrent Hadoop dans ses produits. L'éditeur avait récemment manifesté son intérêt pour la plateforme Java de stockage et de traitement par lot de très grandes quantités de données (Big Data) Hadoop, en publiant notamment deux connecteurs

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  • PowerPivot FILTER condition optimizations

    - by Marco Russo (SQLBI)
    In the comments of a recent post from Alberto Ferrari there was an interesting note about different performance related to the order of conditions in a FILTER call. I investigated about that and Jeffrey Wang has been so nice to give me some info about actual implementation that I can share on a blog post. First of all, an important disclaimer: PowerPivot is intended to make life easier, not requiring the user to think how to write the order of elements in a formula just to get better performance....(read more)

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  • Stairway to SQL PowerShell Level 7: SQL Server PowerShell and the Basics of SMO

    In this level we begin our journey into the SQL Server SMO space. SMO stands for Shared Management Objects and is a library written in .NET for use with SQL Server. The SMO library is available when you install SQL Server Management Tools or you install it separately. FREE eBook – "45 Database Performance Tips for Developers"Improve your database performance with 45 tips from SQL Server MVPs and industry experts. Get the eBook here.

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  • Article Submission - A Crucial Tool For SEO

    Article creation and submission is a powerful tool for getting back-links in SEO. While it helps in maximizing the number of back-links a site has, also it helps in attaining high PR for the targeted page. One can submit article to various article directories. High PR article directories are generally preferred for submission.

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