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  • On The Question Of Automated Website Testing

    Almost all webmasters (or at least "quite a lot of webmasters") have heard about the significance of website testing before the production. Having developed a website or a web application, most authors want to publish it immediately and see how people like it. If they ignore prior website testing, the project may appear unprepared for real Internet activity and reveal awful performance.

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  • Introducing Dart

    Introducing Dart The Dart project includes a modern scalable language, libraries, and tools to help developers build large complex web applications. Watch this video to learn about the different parts of the Dart project and how it can help you be more productive building high performance web apps. Learn more at dartlang.org From: GoogleDevelopers Views: 2205 69 ratings Time: 04:00 More in Science & Technology

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  • How much work advanced level developer performs during the day, week or month? [closed]

    - by user1866998
    I have never worked in the large IT-corporations, and it is very interesting for me of how much work advanced level developer has to perform during the period of, for example, a week or month. So what is the average performance and intensity of work of such a high class professionals expected by employers? I understand that the question is a bit abstract and the result depends on the set of different factors in every particular case, but I think that it is possibly to do the average and rough estimation or to give an example.

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  • Showplan Operator of the Week – BookMark/Key Lookup

    Fabiano continues in his mission to describe the major Showplan Operators used by SQL Server's Query Optimiser. This week he meets a star, the Key Lookup, a stalwart performer, but most famous for its role in ill-performing queries where an index does not 'cover' the data required to execute the query. If you understand why, and in what circumstances, key lookups are slow, it helps greatly with optimising query performance.

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  • Submit to Google and Verify For Results

    Website operators should understand that successful verification does not affect their Google PageRank, or directly affect website performance; in Google's organic search results. With that being said, the data received in your Webmaster Tools, from a natural crawl of your website; is incredibly valuable to improving your SEO results.

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  • LOB Pointer Indexing Proposal

    - by jchang
    My observations are that IO to lob pages (and row overflow pages as well?) is restricted to synchronous IO, which can result in serious problems when these reside on disk drive storage. Even if the storage system is comprised of hundreds of HDDs, the realizable IO performance to lob pages is that of a single disk, with some improvement in parallel execution plans. The reason for this appears to be that each thread must work its way through a page to find the lob pointer information, and then generates...(read more)

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  • Top Exastack Partner Headlines - 7 Nov

    - by Roxana Babiciu
    R-Style Softlab recommends RS-solutions with Exadata and SuperCluster to improve business performance for their customers. Read more. WingArc, a subsidiary of 1st Holdings, Inc., finds Oracle Exadata’s substantial computing power enabling to their enterprise output management solution (SVF/RD). It helps solve the problem of providing an integrated output platform for high volume businesses. Read more.

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  • Detecting Hyper-Threading state

    - by jchang
    To interpret performance counters and execution statistics correctly, it is necessary to know state of Hyper-Threading. In principle, at low overall CPU utilization, for non-parallel execution plans, it should not matter whether HT is enabled or not. Of course, DBA life is never that simple. The state of HT does matter at high over utilization and in parallel execution plans depending on the DOP. SQL Server does seem to try to allocate threads on distinct physical cores at intermediate DOP (DOP less...(read more)

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  • SQL Saturday #237 - Charlotte

    The Charlotte BI Group (CBIG) is excited to bring the 2nd annual SQL Saturday, BI Edition, to Charlotte on October 19. This SQL Saturday training event is focused on Microsoft Business Intelligence, Analytics, and Data Administration topics. Optimize SQL Server performance“With SQL Monitor, we can be proactive in our optimization process, instead of waiting until a customer reports a problem,” John Trumbul, Sr. Software Engineer. Optimize your servers with a free trial.

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  • Optimizing Transaction Log Throughput

    As a DBA, it is vital to manage transaction log growth explicitly, rather than let SQL Server auto-growth events "manage" it for you. If you undersize the log, and then let SQL Server auto-grow it in small increments, you'll end up with a very fragmented log. This article demonstrates how this can have a significant impact on the performance of any SQL Server operations that need to read the log.

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  • Too Much Swapping, even though RAM is 2/3 Empty

    - by indyaah
    I have a VPS with 9GB RAM, 300GB HDD, 3 GB Swap, 7 Cores. The OS is CentOS 5.7 Final. I have postgres9.0 running on my machine, with proper tuning done (at least by book/wiki of PostgreSQL). What happens is most of the times when some complex query run (by complex I mean select with maximum 3 Joins), eventhough 66% of my RAM is unused there is ~99% swapping is happening. Plus it screws up my disk IO which is most of the time reaching ~100% and slows down everything else. (I tend to believe something's wrong with my disk.) I dont understand the reason of this much of swapping happening. Is it because of context switching?? Most of the time my processors are idle, while the IO wait goes upto 30% during pick times. Would appreciate if some can shed some light on it. Thanks.

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  • Grasping Good Google Snippets

    If you're like many web users, you may not even know what a "Google snippet" is, how it should be structured, or even why you should care. But when it comes to optimizing your small business web site, it's definitely worth knowing what a Google snippet really is, and what you can do to make sure it is structured properly so you can improve your web site's performance in the search engine results.

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  • Avoiding Heap Contention Among Threads

    Allocating memory from the system heap can be an expensive operation due to a lock used by system runtime libraries to synchronize access to the heap. Contention on this lock can limit the performance benefits from multithreading. Learn how to solve this problem.

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  • Avoiding Heap Contention Among Threads

    Allocating memory from the system heap can be an expensive operation due to a lock used by system runtime libraries to synchronize access to the heap. Contention on this lock can limit the performance benefits from multithreading. Learn how to solve this problem.

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  • New Exadata e-book!

    - by Javier Puerta
    Use this new e-book with your customers to learn why Oracle Exadata is the right choice for all database applications and deployments, including private cloud. Oracle Exadata is an engineered system ideal for consolidating databases and accelerating data warehousing performance. This new e-book provides access to a variety of materials including articles, white papers, workbooks, webcasts, and videos to help you achieve your goals

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