Intel 170 Servers, AS/400 RISC Server WebSphere Application Server, What’s new in V6R1?, Thi, Sho

6.3 WebSphere Application Server

This section discusses System i performance information for the WebSphere Application Server, including WebSphere Application Server V6.1, WebSphere Application Server V6.0, WebSphere Application Server V5.0 and V5.1, and WebSphere Application Server Express V5.1. Historically, both WebSphere and i5/OS Java performance improve with each version. Note from the figures and data in this section that the most recent versions of WebSphere and/or i5/OS generally provides the best performance.

What’s new in V6R1?

The release of i5/OS V6R1 brings with it significant performance benefits for many WebSphere applications. The following chart shows the amount of improvement in transactions per second (TPS) for the Trade 6.1 workload using various data access methods:

	V5R4 GA		V6R1 GA
1400
1200	+68%		+78%
1000			+50%
800
600
400
200				Thi
0
	Native JDBC	Toolbox JDBC Universal JCC		s
				cha
				rt
				sho

ws that in V6R1, throughput levels for Trade 6.1 increased from 50% to nearly 80% versus V5R4, depending on which JDBC provider was being used. All measurement results were obtained in a 2-tier environment (both application and database on the same partition) on a 2-core 2.2Ghz System i partition, using Version 6.1 of WebSphere Application Server and IBM Technology for Java VM. Although many of the improvements are applicable to 3-tier environments as well, the communications overhead in these environments may affect the amount of improvement that you will see.

The improvements in V6R1 were primarily in the JDBC, DB2 for i5/OS and Java areas, as well as changes in other i5/OS components such as seize/release and PASE call overhead. The majority of the improvements will be achieved without any changes to your application, although some improvements do require additional tuning (discussed below in Tuning Changes for V6R1). Although some of the changes are now available via V5R4 PTFs, the majority of the improvement will only be realized by moving to V6R1. The actual amount of improvement in any particular application will vary, particularly depending on the amount of JDBC/DB activity, where a significant majority of the changes were made. In addition,

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
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