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  • What are the performance implications of wildcard mapping all requests through IIS 6.0?

    - by slolife
    I am interested in using UrlRewriter.NET and noticed in the config page for IIS 6.0 on Win2k3, that they say to map all requests through the ASP.NET ISAPI. That's fine, but I am wondering if anyone has good or bad things to say about this performance wise? Is my web server going to be dragged down to its knees by doing this or will it be more of a small step up in server load? My server currently has room to breathe now, so some performance hit is expected and acceptable.

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  • Performance Related features for migration from .net 2003 Framework 1.1 to .net 2008 framework 3.5?

    - by KuldipMCA
    I am work on VB.net 2003 Framework 1.1 for last 3.5 years in windows Application. We are currently migrating to VB.net 2008 framework 3.5, but i don't know about the features which related to ADO.net and which is important to performance. I know linq to SQL but our architecture is made in .net 2003 so we should follow this. Any features which is very important to enhance the performance?

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  • May we have Ruby and Rails performance statistics? We're persuading the business to use Rails!

    - by thekingoftruth
    We're convincing our Products officer that we want to use JRuby on Rails, and we're having a hard time coming up with some statistics which show that: Coding time is less using Rails vs. say Struts or Zend Framework or what have you. Ruby (and JRuby in particular) performance isn't horrible (anymore). Rails performance isn't bad either. If you can get us some good stats quickly, we might have a chance!

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  • Performance of String literals vs constants for Session[...] dictionary keys

    - by FreshCode
    Session[Constant] vs Session["String Literal"] Performance I'm retrieving user-specific data like ViewData["CartItems"] = Session["CartItems"]; with a string literal for keys on every request. Should I be using constants for this? If yes, how should I go about implementing frequently used string literals and will it significantly affect performance on a high-traffic site? Related question does not address ASP.NET MVC or Session.

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  • What issues carry the highest risk in a software project?

    - by Mehrdad Afshari
    Clearly, software projects are different from other industries in terms of many things like for instance, quality assurance, project progress measurement, and many other things. Unique characteristics of software projects also makes the risk management process unique. Lots of issues in a project might lead it to unacceptable delay or failure to deliver business value. They might even make a complete disaster in the project. What are the deadliest risk factors in a software project? How to analyze, prevent and handle them? Particularly, I'm interested in the issues that you can detect from the beginning and you should keep an eye on (for example, you might be told about a third-party API that the current application uses and lacks documentation). Please share your experiences if they are relevant.

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  • What is the performance difference between blocks and callbacks?

    - by Don
    One of the things that block objects, introduced in Snow Leopard, are good for is situations that would previously have been handled with callbacks. The syntax is much cleaner for passing context around. However, I haven't seen any information on the performance implications of using blocks in this manner. What, if any, performance pitfalls should I look out for when using blocks, particularly as a replacement for a C-style callback?

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  • Anyone experiencing audio issues with VirtualBox on Linux and has a solution?

    - by DoxaLogos
    I've been using Virtualbox (now at 3.0.2) on Kubuntu (now at 9.04) for a while now, and I seem to have a problem when running Windows. Sometime after a while the audio will cut out in Kubuntu. The only way I can get it to recover is to make sure VirtualBox is completely shutdown and either going into multimedia under "system settings" and test the audio or restart. I'm wondering if anyone else here has experienced similar issues and has come up with a more elegant solution. I can't seem to find a reasonable one at virtualbox.org.

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  • What kind of issues would occur if resolve.conf had no dns servers set?

    - by Stuart Woodward
    I want to create a server for a customer and have that customer finish the configuration for themselves. It was been decided that rather than setting default DNS servers (i.e. something like Google's) that the customer should enter the information by themselves. I assume that the customer is technically competent enough to do this. If however they forget or neglect to set this up they might spend some time trying to figure out what is wrong and eventually contact support. (In this case, I think that setting a default might have been better.) Apart from the obvious inability to resolve hosts, what other issues might they face until they have set valid dns servers in resolve.conf?

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  • Switching from PHP to Ruby - is it the answer to performance?

    - by Industrial
    Hi everyone, I get more often the answer, when asking performance related stuff regarding PHP applications, that PHP really isn't the language for high-performance applications, and that a compiled language really is the way to go. The only thing holding me back to PHP is that it's what I have learned to work with for some while now and the development is quite rapid. So, is PHP a thing of the past and should be put aside in web applications in favour of Ruby, for instance? Thanks

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  • Does connecting to the default host via public IP from within its subnet cause any issues?

    - by username
    I'm setting up a small office network with a single public IP (let's say it's 69.16.230.117). I've configured NAT on the router with incoming traffic forwarded to the server (say the server has a private IP of 192.168.0.2). Is it okay to configure the client machines on the same subnet to access the server via the router's public IP (69.16.230.117)? In practice it's never caused me problems, but I've heard, here and there, that it is a bad idea, and one should use the private IP (192.168.0.2). Does connecting to the default host via public IP from within its subnet cause any issues? Please refrain from writing "never! it breaks the intranet!" ;-)

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  • Pivot table from multiple spreadsheets

    - by vrao
    I am using excel 2010. I am trying to create pivot table between two worksheets 'Summary' and 'Summary2'. I have identical row of data ranging from cells B5 to F5 in row 5 in both worksheets. Data in the two worksheets looks like this: Summary worksheet: Issues,20,3,4,5 Summary2 worksheet: Issues,10,0,3,9 Worksheet referes to issues from location 1 and worksheet referes to issues from location 2. Col B has title 'issues', Col C refers to issues of customer 1, Col D refers to issues of customer 2, Col E refers to issues of customer 3, Col F refers to issues of customer 4 I go to a third worksheet and start pivot table and in the table range I give this: 'Summary:Summary2'!$B$5:$F$5. Then I Say OK. Gives error "data reference source is not valid". Can someone tell me how to select the row from two different worksheet in pivot table? Also I want to be able to add issues of customers between two locations and get % completion for each locaiton. Can someone please help?

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  • In mysql I want to set lower_case_table_names=1 on existing databases to avoid cases-sensitivity issues accross multiple platforms

    - by sakhunzai
    In mysql I want to set lower_case_table_names=1 on existing databases to avoid cases-sensitivity issues accross multiple platforms. A) What are the risks ?( besides show table issue) B) After setting lower_case_table_names=1, will I be in position to query databases across multiple platforms consistantly ? select * from USERS == select * from users; C) How the triggers + stored procedure + functions + views + events will be affected in this regards. I know lower_case_table_names is only for "TABLE" names but how about triggers other database objects . Will they remain case-insensitive How about views ? D) Do I need to rename all tables before/after this configuration setting or this will do the miracle in one step (i.e lower_case_table_names=1 neutralize table names) ? E) What will be the exact steps WRT:mysqd / my.ini ?

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  • Is there an free (or cheap) issue tracking software that allow you hide some issues to some member g

    - by Andrea Francia
    I need a Issue Tracking System that allow me to share information on a selective manner. I would be able to define these groups: supplier (my company) subcontractors customer Then, I would be able to define three type of permissions for issues: Issue that can be viewed only by supplier Issue that can be viewed only by supplier and subcontractors Issue that can be viewed by all (supplier, subcontractors, customer) I tried redmine but I didn't find a way of hide some issues, they are always visible. There is an open issue and a patch for that but I not sure if it suit well for my situation. With this patch you need always to remember to make it private and there is only a level of permission: private or not. I need something more flexible. EDIT: I need a software that works on Fedora Linux.

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  • Do you have references issues with Visual Studio 2008 and C#.Net?

    - by Brian T Hannan
    I'm working on a project and it seems that every time someone checks out the project from source control to build it on their local box they have issues building because references are no longer resolved. I can't figure out if it's a configuration issues or a Visual Studio 2008 issue. Is anyone else having this problem? If so, is there something you can do to fix this issue? Note: it might have something to do with explicit paths to the DLLs being referenced or how they are referenced ... I'm not quite sure.

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  • Update on ASP.NET MVC 3 RC2 (and a workaround for a bug in it)

    - by ScottGu
    Last week we published the RC2 build of ASP.NET MVC 3.  I blogged a bunch of details about it here. One of the reasons we publish release candidates is to help find those last “hard to find” bugs. So far we haven’t seen many issues reported with the RC2 release (which is good) - although we have seen a few reports of a metadata caching bug that manifests itself in at least two scenarios: Nullable parameters in action methods have problems: When you have a controller action method with a nullable parameter (like int? – or a complex type that has a nullable sub-property), the nullable parameter might always end up being null - even when the request contains a valid value for the parameter. [AllowHtml] doesn’t allow HTML in model binding: When you decorate a model property with an [AllowHtml] attribute (to turn off HTML injection protection), the model binding still fails when HTML content is posted to it. Both of these issues are caused by an over-eager caching optimization we introduced very late in the RC2 milestone.  This issue will be fixed for the final ASP.NET MVC 3 release.  Below is a workaround step you can implement to fix it today. Workaround You Can Use Today You can fix the above issues with the current ASP.NT MVC 3 RC2 release by adding one line of code to the Application_Start() event handler within the Global.asax class of your application: The above code sets the ModelMetaDataProviders.Current property to use the DataAnnotationsModelMetadataProvider.  This causes ASP.NET MVC 3 to use a meta-data provider implementation that doesn’t have the more aggressive caching logic we introduced late in the RC2 release, and prevents the caching issues that cause the above issues to occur.  You don’t need to change any other code within your application.  Once you make this change the above issues are fixed.  You won’t need to have this line of code within your applications once the final ASP.NET MVC 3 release ships (although keeping it in also won’t cause any problems). Hope this helps – and please keep any reports of issues coming our way, Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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  • Visual Studio 2010 Service Pack 1 Released

    - by krislankford
    The VS 2010 SP 1 release was simultaneous to the release of TFS 2010 SP1 and includes support for the Project Server Integration Feature Pack and updates to .NET Framework 4.0. The complete Visual Studio SP1 list including Test and Lab Manager: http://support.microsoft.com/kb/983509 The release addresses some of the most requested features from customers of Visual Studio 2010 like better help support IntelliTrace support for 64bit and SharePoint Silverlight 4 Tools in the box unit testing support on .NET 3.5 a new performance wizard for Silverlight Another major addition is the announcement of Unlimited Load Testing for Visual Studio 2010 Ultimate with MSDN Subscribers! The benefits of Visual Studio 2010 Load Test Feature Pack and useful links: Improved Overall Software Quality through Early Lifecycle Performance Testing: Lets you stress test your application early and throughout its development lifecycle with realistically modeled simulated load. By integrating performance validations early into your applications, you can ensure that your solution copes with real-world demands and behaves in a predictable manner, effectively increasing overall software quality. Higher Productivity and Reduced TCO with the Ability to Scale without Incremental Costs: Development teams no longer have to purchase Visual Studio Load Test Virtual User Pack 2010. Download the Visual Studio 2010 Load Test Feature Pack Deployment Guide Get started with stress and performance testing with Visual Studio 2010 Ultimate: Quality Solutions Best Practice: Enabling Performance and Stress Testing throughout the Application Lifecycle Hands-On-Lab: Introduction to Load Testing with ASP.NET Profile in Visual Studio 2010 How-Do-I videos: Use ASP.NET Profiler in Load Tests Use Network Emulation in Load Tests VHD/VPC walkthrough: Getting Started with Load and Performance Testing Best Practice guidance: Visual Studio Performance Testing Quick Reference Guide

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  • Monitora&ccedil;&atilde;o com Oracle Enteprrise Manager

    - by fernando.galdino
    A figura abaixo oferece uma visão geral das possibilidades de monitoramento providas pelo Oracle Enterprise Manager (OEM), que é uma ferramenta que permite gerenciar a infraestrutura de TI da empresa. Um componente importante da solução é chanado OEM Grid Control. Esse componente permite gerenciar, visualizar e monitorar diversos elementos a partir de uma mesma console. E que elementos podem ser monitorados? No conceito utilizado pelo OEM, os elementos que podem ser monitorados são chamados de Targets, e esses targets envolvem a monitoração de hosts (Windows, Linux, Solaris), Banco de Dados, Middleware, Aplicações Web, Serviços que podem ser customizados pelo administrador, Sistemas e Grupos de targets, além dos aplicativos Oracle. Cada elemento monitorado é ativado através de packs de gerenciamento. Ou seja, há uma série de packs que podem ser adquiridas conforme a necessidade, para permitir a monitoração a partir do próprio OEM Grid Control. Existem packs de monitoramento especiais para banco de dados Oracle, packs de monitoramento para Tomcat, Jboss, WebLogic, SOA Suite, Identity Management. A lista é bem extensa e darei mais detalhes em um novo post. Mas caso queira visitar, veja: http://download.oracle.com/docs/cd/B16240_01/doc/nav/overview.htm Além das packs de monitoramento, existem também plugins e conectores. Os plugins permitem o gerenciamento de elementos adicionais, tais como dispositivos de rede, servidores, banco de dados de terceiros (DB2, SQL Server), Vmware, etc. Já os conectores permitem a integração com outros softwares, tais como gerenciadores de requisições de helpdesk, de modo a integrar os alertas gerados pela ferramenta e gerar tickets em ferramentas como CA Service Desk, BMC Remedy e outros. A extensão de funcionalidades é realmente bem vasta. Num próximo post irei comentar sobre o Ops Center, um novo componente que surgiu após a aquisição da Sun. Além do Grid Control e do Ops Center, há outros componentes bem interessantes. A figura abaixo ilustra diversas camadas onde o ferramental Oracle pode ser usado para monitoração. Há uma pack que permite gerenciar os níveis de serviços em todas as camadas ilustradas. Dada uma requisição, pode-se decompor os dados de SLA em cada camada. E há também o Real User Monitoring, que trata de medir a experiência com o usuário. Falarei disso num novo post, mas basicamente a ferramenta permite acompanhar todo o tráfego de rede gerado dos usuários finais até os servidores web, e com isso rastrear como cada usuário usa a aplicação, quanto tempo ele navega pelo site, se ele enfrentou algum tipo de problema, se houve algum pedido não finalizado devido a algum problema na infraestrutura. É uma ferramenta bem interessante, falarei um pouco mais dela depois. E claro, há também componentes para a realização de testes funcionais e de carga. Em breve, aqui no blog :)

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  • Motores tecnológicos para el crecimiento económico

    - by Fabian Gradolph
    Oracle ha participado hoy en el IV Curso de Verano AMETIC-UPM. La presentación a corrido a cargo de José Manuel Peláez, director de Preventa de Tecnología de Oracle Ibérica, quien ha hecho una completa revisión de cuáles son los impulsores actuales de la innvovación y del desarrollo en el entorno de las tecnologías, haciendo honor al título del curso:  Las TIC en el nuevo entorno socio-económico: Motores de la recuperación económica y el empleo. Peláez, en su presentación "De la tecnología a la innovación: impulsores de la actividad económica",  ha comenzado destacando la importancia estratégica que hoy en día tienen las tecnologías para cualquier modelo de negocio. No se trata ya de hacer frente a la crisis económica, que también, sino sobre todo de hacer frente a los desafíos presentes y futuros de las empresas. En este sentido, es esencial hacer frente a un reto: el alto coste que tiene para las organizaciones la complejidad de sus sistemas tecnológicos. Hay un ejemplo que Oracle utiliza con frecuencia. Si un coche se comprase del mismo modo en que las empresas adquieren los sistemas de información, compraríamos por un lado la carrocería, por otro lado el motor, las ventanas, el cambio de marchas, etc... y luego pasaríamos un tiempo muy interesante montándolo todo en casa. La pregunta clave es: ¿por qué no adquirir los sistemas de información ya preparados para funcionar, al igual que compramos un coche?. El sector TI, con Oracle a la cabeza, está dando uina respuesta adecuada con los sistemas de ingenería conjunta. Se trata de sistemas de hardware y software diseñados y concebidos de forma integrada que reducen considerablemente el tiempo necesario para la implementación, los costes de integración y los costes de energía y mantenimiento. La clave de esta forma de adquirir la tecnología, según ha explicado Peláez, es que al reducir la complejidad y los costes asociados, se están liberando recursos que pueden dedicarse a otras necesidades. Según los datos de Gartner, de la cantidad de recursos invertidos por las empresas en TI, el 63% se dedica a tareas de puro funcionamiento, es decir, a mantener el negocio en marcha. La parte de presupuesto que se dedica a crecimiento del negocio es el 21%, mientras que sólo un 16% se dedica a transformación, es decir, a innovación. Sólo mediante la utilización de tecnologías más eficientes -como los sistemas de ingeniería conjunta-, que lleven aparejados menores costes, es viable reducir ese 63% y dedicar más recursos al crecimiento y la innovación. Ahora bien, una vez liberados los recursos económicos, ¿hacia dónde habría que dirigir las inversiones en tecnología?. José Manuel Peláez ha destacado algunas áreas esenciales como son Big Data, Cloud Computing, los retos de la movilidad y la necesidad de mejorar la experiencia de los clientes, entre otros. Cada uno de estos aspectos lleva aparejados nuevos retos empresariales, pero sólo las empresas que sean capaces de integrarlos en su ADN e incorporarlos al corazón de su estrategia de negocio, podrán diferenciarse en el panorama competitivo del siglo XXI. Desde estas páginas los iremos desgranando poco a poco.

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  • Huge or minimal performance hit running game servers on a Virtual Machine? [closed]

    - by Damainman
    I have a two dedicated servers to choose from depending on which one would do a better job. I plan on updating the Hard Drive space and RAM at a later date depending on how I move forward. Server 1: 500GB Hard Drive 8GB RAM 2x 64bit Intel Xeon L5420(Quad Core) @ 2.50Ghz Server2: 500GB Hard Drive 8GB RAM 2x 64bit Intel Xeon E5420(Quad Core) @ 2.50GHz I want to run a virtual machine that will host about 10 game servers, with about 16 active slots per server. It will be a mix and match from: Minecraft Counter Strike( 1.6, Source, Global Offensive) Battlefield Team Fortress I know the general consensus is virtualization is a horrible idea if you plan on running virtual servers on them. The issue is, the discussions I read do not really clearly state whether they are speaking about a virtual server running inside an OS(ie: VMware Player running on Windows with the game server in a VM) or a Hypervisor such as Xen Cloud Platform. I am trying to get a definite answer on how feasible the above would be and how much of a performance hit it might be if the VM running the game servers is on a hypervisor such as Xen Cloud Platform. My initial research lead me to believe that there wouldn't be a performance hit since the virtualization is different than running it via inside of a OS.

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  • Poor performance on IIS7, only on Windows Server 2008, fine on Windows 7?

    - by user32005
    Hi, I'm new to IIS7 but have experience with other versions. I've been working on an application that works great in a dev environment (as always) but when I push it to a windows server 2008/IIS7 box performance takes a noticeable hit. The dev environment is Windows7/IIS7. The configuration in IIS is the same on the dev box as the server. I've tried all sorts of things to try and find a reason for this but I cant come to any conclusion. I've ruled out database problems on the live box as all data is cached after the first request. I've confirmed this to be true and made sure there is no additional database traffic. I've ruled out network issues with a combination of monitoring requests with fiddler and local debugging on the server. Whenever the code runs on the server there seems to be a performance issue. The server: Intel Core 2 Quad CPU Q6600 @ 2.40ghz with 2gb RAM. I know this is not fantastic but I was expecting it to at least perform as well as my dev environment (which is running much more on a lower spec). The CPU using peaks at under 60%, and memory usage is less than half of the available. I've enabled failed request tracing and most of the time is spent in a custom HttpModule, this module works to handle every request, I cant get any more detail as to what within the module may be causing the problem. Any ideas, I've been pulling my hair out for days now. Thanks

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  • Should I use nginx exclusively, or have it as a proxy to Tomcat (performance related)?

    - by Kevin
    I've planned to create a website that'll be pretty heavy on dynamic content, and want to know what would be the wisest choice for part of my webstack. Right now I'm trying to decide whether I should develop upon nginx, using PHP to deliver the dynamic content, or use nginx as a proxy to Tomcat and use servlets to deliver the dynamic content. I have a good amount of experience with Java, JSP, and servlets, so that's a plus right off the bat. Also, since it is a compiled language, it will execute faster than PHP (it is implied here that Java is around 37x faster than PHP) , and will create the web pages faster. I have no experience with PHP, however i'm under the impression that it is easy to pick up. It's slower than Java, but since the client will only be communicating with nginx, I'm thinking that serving the dynamically created web pages to the client will be faster this way. Considering these things, i'd like to know: Are my assumptions correct? Where does the bottleneck occur: creating pages or serving them back to the client? Will proxying Tomcat with nginx give me any of nginx performance benefits if I'm going to be using Tomcat to generate the dynamic content (keeping in mind my site is going to be heavy in this aspect)? I don't mind learning PHP if, in the end, its going to give me the best performance. I just want to know what would be the best choice from that standpoint.

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  • Windows Small Business System 2003. SQL timeout in Server Performance Report

    - by tetranz
    I'm the volunteer IT admin at a small school. We have SBS 2003 with about ten desktops. The server performance report is emailed to me daily. It is setup with a wizard in the Monitoring and Performance part of the "Server Management" console. It often fails with a "The page cannot be displayed" error. The event log shows Event Type: Error Event Source: ServerStatusReports Event Category: None Event ID: 1 Date: 1/16/2011 Time: 6:03:14 AM User: N/A Computer: ALPHA Description: Server Status Report: URL: http://localhost/monitoring/perf.aspx?reportMode=1&allHours=1 Error Message: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. Stack Trace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, TdsParserState state) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, TdsParserState state) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() at System.Data.SqlClient.TdsParser.ReadNetlib(Int32 bytesExpected) [plus lots more stack trace] This has been happening for years :) I've never really solved it. It seems to be related to WSUS. When it happens, I run the Update Services "Server Cleanup Wizard". That takes a long time to run. If I haven't run it for a while it can take 10 hours. I also run the WsusDBMaintenance.sql script (from TechNet I think) which reindexes the database etc. Those two things seem to get it working again for a while. Recently the "while" has become a couple of weeks. My searching online has revealed lots of people having this problem but no real solution. Does anyone have any good ideas about this? I have to wonder if something in the WSUS SQL schema is not indexed properly. The time that the server cleanup wizard takes seems ridiculous. Thanks

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