crystal reports barcode font formula Parsing and Scaling Applications in Font

Drawing Code39 in Font Parsing and Scaling Applications

Parsing and Scaling Applications
Code 3 Of 9 Drawer In None
Using Barcode creator for Font Control to generate, create Code 3 of 9 image in Font applications.
www.OnBarcode.com
Draw QR Code In None
Using Barcode generation for Font Control to generate, create Denso QR Bar Code image in Font applications.
www.OnBarcode.com
When the number of users keeps increasing, some systems have trouble coping. Performance slows down dramatically in many systems as a result of trying to scale to increased user populations. When your user counts are increasing, focus on unnecessary parsing in your system. A high level of parsing leads to latch contention, which slows down the system. Here are some guidelines that help summarize the previous discussion about the library cache, parsing, and the use of special initialization parameters: A standard rule is to put as much of the code as possible in the form of stored code packages, procedures, and functions so you don t have the problems caused by ad hoc SQL. Use of ad hoc SQL could wreak havoc with your library cache, and it s an inefficient way to run a large application with many users. Using stored code guarantees that code is identical and thus reused, thereby enhancing scalability. Lower the number of hard parses, as they could be expensive. One way to convert a hard parse to a soft parse is to use bind variables, as you saw earlier in this chapter. Reducing hard parsing reduces shared-pool latch contention. If bind variables aren t being used in your system, you can use the CURSOR_SHARING=FORCE parameter to force the sharing of SQL statements that differ only in the value of literals. Pay attention to the amount of soft parsing, not the per unit cost, which is much lower than that of a hard parse. A high amount of soft parsing increases contention for the library cache latch and could lead to a slow-performing database. The point to note here is to avoid any unnecessary soft parsing, which will end up costing you. Use the SESSION_CACHED_CURSORS initialization parameter to reuse the open cursors in a session. If repeated parse calls are used for a SQL statement, Oracle moves the session cursor for that statement into the session cursor cache. This, as you ve seen, reduces the amount of soft parsing. Set the value of this parameter to somewhere between the value of the OPEN_CURSORS initialization parameter and the number of cursors that are being used in the session. Use the CURSOR_SPACE_FOR_TIME initialization parameter (set it to TRUE) to prevent the early deallocation of cursors. If you don t mind the extra cost of using more memory, this feature will enhance your application s scalability level.
Creating GS1 - 12 In None
Using Barcode creation for Font Control to generate, create UPCA image in Font applications.
www.OnBarcode.com
PDF 417 Drawer In None
Using Barcode printer for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
CHAPTER 20 PERFOR MAN CE TUNING: TUNING THE INSTA NCE
Barcode Creator In None
Using Barcode creator for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Paint Code39 In None
Using Barcode printer for Font Control to generate, create ANSI/AIM Code 39 image in Font applications.
www.OnBarcode.com
Reduce the amount of session logging on/off activity by users. This may reduce scalability due to the increased amount of overhead involved in authenticating the user, verifying privileges, and so on, leading to a waste of time and resources. Furthermore, the users may be spending more time trying to log into the system than executing their SQL statements. Frequent logging off and logging back on might also cause contention for the web server and other resources, and increase the time it takes to log into your system. To increase scalability, you must also ensure that applications share sessions. If you only have shared SQL, your hard parses will go down, but your soft parses might still be high. If an application program can maintain a persistent connection to the Oracle server, it doesn t have to perform repeated soft parsing to reuse code.
Creating GS1 128 In None
Using Barcode creator for Font Control to generate, create EAN / UCC - 13 image in Font applications.
www.OnBarcode.com
Encoding Postnet In None
Using Barcode drawer for Font Control to generate, create USPS POSTNET Barcode image in Font applications.
www.OnBarcode.com
Sizing the Shared Pool
Draw Code 3 Of 9 In Java
Using Barcode drawer for Java Control to generate, create Code 39 image in Java applications.
www.OnBarcode.com
Code 39 Scanner In .NET Framework
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
The best way to set the size of the shared pool in Oracle Database 11g is to let Oracle do all the work for you by using the MEMORY_TARGET initialization parameter, thus automating the management of SGA. You can initially set the SGA_TARGET parameter at something close to the total SGA you would have allocated under a manual management mode. Review the material in 17 for guidance on setting your initial MEMORY_TARGET value.
Creating Barcode In .NET
Using Barcode creation for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
Scan Barcode In Visual Studio .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Print Barcode In Objective-C
Using Barcode generator for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
Generate Barcode In None
Using Barcode generator for Software Control to generate, create Barcode image in Software applications.
www.OnBarcode.com
Creating PDF417 In Java
Using Barcode creator for Java Control to generate, create PDF417 image in Java applications.
www.OnBarcode.com
Code-39 Drawer In Objective-C
Using Barcode drawer for iPad Control to generate, create Code39 image in iPad applications.
www.OnBarcode.com
Code 39 Reader In .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
GS1 128 Recognizer In Visual C#.NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Creating PDF-417 2d Barcode In .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create PDF 417 image in VS .NET applications.
www.OnBarcode.com
Encoding Data Matrix ECC200 In VS .NET
Using Barcode generator for VS .NET Control to generate, create DataMatrix image in .NET framework applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.