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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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  • Why Your Abstract Wasn't Selected

    - by AllenMWhite
    We're anxiously waiting to hear from PASS which sessions were selected for the 2014 Summit in November. It's a big job to go through the hundreds of submissions and pick the sessions that will appeal to the people who will be paying over $1,000 to attend this annual event. As I am also waiting to hear the results, I saw this article addressed to actors who didn't get cast for the part they worked so hard to audition for, and it seemed appropriate to address the same issues for would-be Summit speakers....(read more)

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  • CVE-2012-1573 Denial of Service vulnerability in gnutls

    - by Umang_D
    CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2012-1573 Cryptographic Issues vulnerability 5.0 gnutls Solaris 11 11/11 SRU 12.4 This notification describes vulnerabilities fixed in third-party components that are included in Oracle's product distributions.Information about vulnerabilities affecting Oracle products can be found on Oracle Critical Patch Updates and Security Alerts page.

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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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  • 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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  • SEQUENCE in SQL Server 2011

    SEQUENCE is a core new feature of SQL Server 2011 (Denali). It is a more performant, flexible alternative to the INDENTITY attribute. This article introduces sequence and demonstrates how to use it and its performance advantage. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Why does Ubuntu 12.04 dual boot fail?

    - by Tranas
    Fresh install of XP followed by a fresh install of Ubuntu 12.04 results in the following error: error: unknown filesystem. grub rescue and the machine will not boot. Prior to the 12.04 install, XP worked fine. During the 12.04 install, all partitions and free space was visible, and the install seemed to complete without issues until the error message. Although I can fix the MBR via recovery console in XP and allow the machine to boot to windows, why is GRUB/Ubuntu trashing the boot sequence?

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  • Oracle Data Protection: How Do You Measure Up? - Part 1

    - by tichien
    This is the first installment in a blog series, which examines the results of a recent database protection survey conducted by Database Trends and Applications (DBTA) Magazine. All Oracle IT professionals know that a sound, well-tested backup and recovery strategy plays a foundational role in protecting their Oracle database investments, which in many cases, represent the lifeblood of business operations. But just how common are the data protection strategies used and the challenges faced across various enterprises? In January 2014, Database Trends and Applications Magazine (DBTA), in partnership with Oracle, released the results of its “Oracle Database Management and Data Protection Survey”. Two hundred Oracle IT professionals were interviewed on various aspects of their database backup and recovery strategies, in order to identify the top organizational and operational challenges for protecting Oracle assets. Here are some of the key findings from the survey: The majority of respondents manage backups for tens to hundreds of databases, representing total data volume of 5 to 50TB (14% manage 50 to 200 TB and some up to 5 PB or more). About half of the respondents (48%) use HA technologies such as RAC, Data Guard, or storage mirroring, however these technologies are deployed on only 25% of their databases (or less). This indicates that backups are still the predominant method for database protection among enterprises. Weekly full and daily incremental backups to disk were the most popular strategy, used by 27% of respondents, followed by daily full backups, which are used by 17%. Interestingly, over half of the respondents reported that 10% or less of their databases undergo regular backup testing.  A few key backup and recovery challenges resonated across many of the respondents: Poor performance and impact on productivity (see Figure 1) 38% of respondents indicated that backups are too slow, resulting in prolonged backup windows. In a similar vein, 23% complained that backups degrade the performance of production systems. Lack of continuous protection (see Figure 2) 35% revealed that less than 5% of Oracle data is protected in real-time.  Management complexity 25% stated that recovery operations are too complex. (see Figure 1)  31% reported that backups need constant management. (see Figure 1) 45% changed their backup tools as a result of growing data volumes, while 29% changed tools due to the complexity of the tools themselves. Figure 1: Current Challenges with Database Backup and Recovery Figure 2: Percentage of Organization’s Data Backed Up in Real-Time or Near Real-Time In future blogs, we will discuss each of these challenges in more detail and bring insight into how the backup technology industry has attempted to resolve them.

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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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  • Row Count Plus Transformation

    As the name suggests we have taken the current Row Count Transform that is provided by Microsoft in the Integration Services toolbox and we have recreated the functionality and extended upon it. There are two things about the current version that we thought could do with cleaning up Lack of a custom UI You have to type the variable name yourself In the Row Count Plus Transformation we solve these issues for you.

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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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  • 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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  • 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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  • Improving the Extended Financial Close and Reporting Process

    Coming out of the recession, many organizations need to build or re-build trust with key stakeholders by delivering more timely and accurate financial and operating results. In this podcast, hear about new capabilities Oracle is delivering through its Enterprise Performance Management products to help organizations coordinate and improve the extended financial close and reporting process, from closing the sub-ledgers to regulatory filings.

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  • Manually Editing iptables

    - by JamesB41
    I'm using CentOS. What I'm wondering is, what happens if I manually edit /etc/sysconfig/iptables and save it? Is that the definitive source? When I type iptables -L I get something that doesn't match the contents of that file. Is there a way I can just edit the chains directly without adding/removing rules one at a time? i.e. open VIM and get everything set up the way I want it and then save. Along those lines, when I do something like iptables -A INPUT , where does that go in the immediate sense? Is it not applied until I do an iptables-save? I feel like I'm just missing an a-ha moment here and I can't seem to find the answer in a search.

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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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