.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Performance of CLR HierarchyID related functions

Posted By:      Posted Date: May 22, 2011    Points: 0   Category :

We are seeing some consistently odd behavior from the query engine when running out of the box CLR fucntions against a HierarchyID based tree. We are indexed for width and breadth similar to the technet examples for bills of lading. What we see is that the query engine is not using the indexes resulting in very high cpu cycles and memory pressure. Even more puzzling, is the the plan and dmvs showing a "missing" index that is an exact match for the indexes that are there:






CREATE TABLE [dbo].[tbl_xx_consultantHierarchyPeriodSummary](
	[nodeID] [hierarchyid] NOT NULL,
	<various attribute columns>
	[treeLevel] AS ([nodeID].[GetLevel]()),
	[parentNodeID] AS ([nodeID].[GetAncestor]((1))) PERSISTED,

View Complete Post

More Related Resource Links

ASP.NET Best Practices for High Performance Applications

This article lists the techniques that you can use to maximize the performance of your ASP.NET applications. It provides common issues, design guidelines, and coding tips to build optimal and robust solutions.

Insert value using Table Value Functions

a real gem in Sql Server 2008. mostly people still using Stored procedure may be they shifted to SQL Server but they are not using TVF right now.

Introduction to Functions

A function is a section of code that is used to perform an isolated assignment. Once it has performed its assignment, the function can be accessed to present its result(s).

In Transact-SQL, a function is considered an object. After creating the function object, it becomes part of a database. You can then execute it when necessary.

Built-In Functions Fundamentals

While your primary job as a database developer consists of creating lists, probably your second most important job is to assist your users with the various assignments they must perform on your application. One way you can assist is to use functions that perform otherwise complex tasks. We introduced and described functions in the previous lesson. To assist your development with the different tasks of a database, Transact-SQL ships with various already created and tested functions. You just need to be aware of these functions, their syntax, and the results they produce.

Top .NET Performance Problems and how to avoid them

Every time I work with one of our .NET customers to help them with managing their application performance I come across the same problems as seen with other clients before: lots of ADO.NET queries, many hidden exceptions in core or 3rd party .NET libraries, slow 3rd party components, inefficient custom code

High-Performance .NET Application Development & Architecture

It has always been a goal of project architects to plan an effective strategy from the ground up in regards to an new application. All relevant factors are taken into consideration with respect to the application, from its design and layout to a functional website infrastructure. Pre-.NET strategies and design guidelines still effective now were developed with Microsoft's DNA (Distributed interNet Application) platform. This model successfully served the purpose of architecting N(any number of)-Tier (levels) applications. In its basic sense, as in most robust, distributed applications, you'll architect 3 main layers or Tiers: presentation, business rules and data access.

How to improve the performance of ASP.NET MVC web applications

It is an in depth analysis of a Digg-like site and how it went from serving (on a test machine) 6 req/sec to 390 req/sec.

The biggest gain, 74 req/sec to 390 req/sec happened when he introduced data caching and another 25 req/sec where gained when he introduced the compilation of LINQ queries.

High Performance ASP.NET - Speeding Up ASP.NET Pages

have been writing a series of blog posts, which I have named High Performance ASP.NET Websites Made Easy! There is no rhyme or reason to the order of these posts and certainly can be read in any order:

Developing High Performance and Scalable ASP.NET Websites
Avoid Chatty Interfaces Between the Tiers in Your ASP.NET Web Application
ASP.NET Page Profiling - Page Tracing - High Performance and Scalable ASP.NET Websites Made Easy
Web Applications: N-Tier vs. N-Layer - Benefits and Trade-Offs
Query Analyzer - Sql Server Database Indexes and Execution Plans

Improving Application Performance in .Net

Application performance has always been a concern for Web Application developers. This article contains guidelines and tips for maximizing application performance in ASP.NET.

Tips to Improve Your ASP.NET Web site performance

ASP.NET has been developed with lots of features which makes developer life easy. Start from ViewState, PostBack, Server Controls , User Controls and etc. All of them can make your web development experience fun and easy, but improper use of them can cause your site performance slowdown. Most of the controls generate overhead to the client and server. Therefore in this article, I I will list out about things you can do and don't to improve your ASP.NET website performance.

10 Tips for Writing High-Performance Web Applications

Writing a Web application with ASP.NET is unbelievably easy. So easy, many developers don't take the time to structure their applications for great performance. In this article, I'm going to present 10 tips for writing high-performance Web apps. I'm not limiting my comments to ASP.NET applications because they are just one subset of Web applications. This article won't be the definitive guide for performance-tuning Web applications-an entire book could easily be devoted to that. Instead, think of this as a good place to start.

Display Related Data in an ASP.NET GridView

Typically when you display a datagrid you will want to show data from a related table. There are 3 different ways to accomplish this with NetTiers. You can use a custom stored procedure, deepload functionality from the code behind, or a strongly typed datasource control. We'll provide an example of each

Performance Tests: Precise Run Time Measurements with System.Diagnostics.Stopwatch

Everybody who does performance optimization stumbles sooner or later over the Stopwatch class in the System.Diagnostics namespace. And everybody has noticed that the measurements of the same function on the same computer can differ 25% -30% in run time. This article shows how single threaded test programs must be designed to get an accuracy of 0.1% - 0.2% out of the Stopwatch class. With this accuracy, algorithms can be tested and compared.

Best Coding Techniques To Improve Performance for SharePoint Applications

As more developers write custom code by using the SharePoint Object Model, they encounter common issues that can affect application performance.

The following areas reflect the main issues encountered by developers as they write custom code by using the SharePoint object model:

§ Disposing of SharePoint objects

§ Caching data and objects

§ Writing code that is scalable

Built-in Functions - Text and Image Functions in SQL Server

Text and image functions operate on TEXT, NTEXT and IMAGE data types. These data types are deprecated with SQL Server 2005 and should be replaced by VARCHAR(MAX), NVARCHAR(MAX) and VARBINARY(MAX) when possible. Alternatively you can also consider storing large string values using XML data type. Text and image functions are nondeterministic.

Future versions of SQL Server will not support TEXT, NTEXT and IMAGE data types. Columns with TEXT / NTEXT data type do not support commonly used string functions such as LEN, LEFT, RIGHT, etc. Furthermore, due to the large size of TEXT data you''re likely to see performance issues if you store such data in the database. However, at times you can''t help but use the TEXT / NTEXT / IMAGE data types (for example when supporting 3rd party databases when you cannot change the schema) - this is when text and image functions come in handy.

Date and Time Functions in SQLSERVER

Date and time functions allow you to manipulate columns and variables with DATETIME and SMALLDATETIME data types.

1 DATEPART Function
2 DATENAME Function
3 DAY, MONTH, and YEAR Functions
5 DATEADD Functions
6 DATEDIFF Function
7 More SQL Server Functions

LINQ to SQL Performance Considerations

As developers we have a wide array of tools at our disposal. One of the most time consuming, but most beneficial tasks we must undertake is to determine which of those tools to use for a given situation.
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend