Real World in .NET framework

Creating PDF-417 2d barcode in .NET framework Real World

Real World
PDF417 Creation In VS .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in .NET framework applications.
www.OnBarcode.com
PDF 417 Reader In VS .NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Michael Hotek Much of my career with SQL Server has focused on either achieving maximum uptime or fixing performance issues. Performance problems manifest themselves in a variety of ways, but every issue always comes back to a single root cause: resources. Companies often first try throwing more hardware at the problem by changing servers, adding memory, adding disks, and so on. This rarely solves the performance problem. Most professionals dealing with performance issues start by investigating the code that has been written to access the data, usually identifying a number of changes they can make to improve performance or even solve the issue. Rarely does anyone look into the database table structure, simply because you generally cannot change table structures after a database is in production. Unfortunately, structural issues are at the core of almost every performance problem.
Bar Code Generation In .NET Framework
Using Barcode maker for .NET framework Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
Barcode Recognizer In .NET Framework
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Before You Begin
PDF-417 2d Barcode Encoder In Visual C#.NET
Using Barcode creator for .NET framework Control to generate, create PDF 417 image in Visual Studio .NET applications.
www.OnBarcode.com
Encoding PDF-417 2d Barcode In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create PDF-417 2d barcode image in ASP.NET applications.
www.OnBarcode.com
I spent two weeks at one customer site, analyzing its environment and documenting all the performance issues the organization was having as its application was having to process larger and larger volumes of data. I found lots of ways to improve queries so that they were more efficient and read less data. And I suggested additional improvements the IT team could make to reduce the amount of code that had to be executed to reach a final result. Over the course of my assignment, I identified hundreds of queries that could be tuned, and I changed several dozen of them myself. However, all the changes combined could not overcome the most fundamental problem with the company s application: poor table design. The company s application revolved around dates and scheduling items into time blocks. However, the application never dealt with actual dates; instead it dealt with either minutes or seconds. Unfortunately, when the database tables were designed, everything was stored in a datetime data type. So every query running in the system had to call a function that converted the data into minutes and seconds that could be used by the application. And every time a change had to be made, the application had to convert the minutes and seconds that it used back into a datetime value to be stored in the database. (Because of a nonstandard business week definition, the company couldn t use any of the date or time functions in SQL Server.) After further analysis, we determined that more than 80 percent of the total resources being consumed processor, memory, and input/output (I/O) was involved in this conversion process. We created a simple test database that converted all the datetime columns into integers, stripped out all the conversion code, and then ran several tests. Queries that were taking seconds to execute dropped to 50 milliseconds or less. Queries taking minutes dropped to a few seconds. In the most extreme case, a batch process that ran several times per day and previously took as long as four hours in a given run took less than five minutes to finish, regardless of the amount of data that needed to be processed. Unfortunately, the application data is still stored in datetime columns, and the application still spends 80 percent or more of the total resources that it consumes converting the datetime values into usable values for the application. To change this fundamental structure would have required a complete rewrite of more than 80 percent of the stored procedure code and would have affected almost all the database tables.
Encoding PDF417 In VB.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in .NET applications.
www.OnBarcode.com
Generating Code 128B In Visual Studio .NET
Using Barcode printer for .NET framework Control to generate, create Code 128 image in .NET applications.
www.OnBarcode.com
3
1D Maker In .NET Framework
Using Barcode generator for .NET Control to generate, create Linear Barcode image in VS .NET applications.
www.OnBarcode.com
Creating Barcode In .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create barcode image in VS .NET applications.
www.OnBarcode.com
Creating Tables, Constraints, and User-Defined Types
Create GS1 DataBar Truncated In VS .NET
Using Barcode printer for VS .NET Control to generate, create DataBar image in Visual Studio .NET applications.
www.OnBarcode.com
RM4SCC Printer In VS .NET
Using Barcode generator for .NET Control to generate, create British Royal Mail 4-State Customer Barcode image in VS .NET applications.
www.OnBarcode.com
So when someone tells me that the choice of data types for a table really doesn t matter because storage space is cheap, I wonder just how long it will be before their performance becomes a problem and a problem whose root cause can t be fixed because of business constraints. Disk space might be reasonably inexpensive and essentially limitless, but all the data still has to be moved through memory and processors, and there is a maximum amount of memory and processors that current hardware can support. Every byte wasted when data is stored needlessly consumes a byte of memory along with processor cycles when it is processed. Although a single byte here or there won t do much harm, losing a single byte per row in a table that contains millions of rows of data adds up very quickly to memory pressure and high processor utilization.
Barcode Creator In VS .NET
Using Barcode generator for Reporting Service Control to generate, create bar code image in Reporting Service applications.
www.OnBarcode.com
UPC A Decoder In VB.NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Data Matrix ECC200 Generation In Objective-C
Using Barcode generator for iPad Control to generate, create ECC200 image in iPad applications.
www.OnBarcode.com
GS1 128 Generation In Java
Using Barcode drawer for Android Control to generate, create EAN128 image in Android applications.
www.OnBarcode.com
Code 39 Encoder In Visual Studio .NET
Using Barcode maker for Reporting Service Control to generate, create ANSI/AIM Code 39 image in Reporting Service applications.
www.OnBarcode.com
EAN 13 Drawer In None
Using Barcode creator for Font Control to generate, create EAN13 image in Font applications.
www.OnBarcode.com
Linear Barcode Generation In VS .NET
Using Barcode maker for ASP.NET Control to generate, create Linear Barcode image in ASP.NET applications.
www.OnBarcode.com
Create Barcode In .NET
Using Barcode drawer for ASP.NET Control to generate, create barcode image in ASP.NET applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.