Intel 7xx Servers, 170 Servers Number Processors Partition, Computational Performance -- Java

Fraction of ILE Performance

Better)	1.2
	1
(Bigger
	0.8
Performance	0.6
	0.4
Relative	0.2
	0
	Linux	ILE	PASE

Computational Environment

Integer

Floating

Point

One virtue of the i870, i890, and i825 machines is that the hardware floating point unit can make up for some of the code generation deficit due to its superior hardware scheduling capabilities.

Computational Performance -- Java

Generally, Java computational performance will be dictated by the quality of the JVM used. Gcc performance considerations don't apply (occasional exception: Java Native Methods). Performance on the same hardware with other IBM JVMs will be roughly equal, except that newer JVMs will often arrive a bit later on Linux. The IBM JVM is almost always much faster than the typical open source JVM supplied in many distributions.

Web Serving Performance

Work has been done with web serving solutions. Here is some information (primarily useful for sizing, not performance per se), which gives some idea of the web serving capacity for static web serving.

Number of 840	0.5	1	2	4
Processors in
Partition
# of web server	514	1,024	1,878	3,755
hits per second,
Apache 1.3
# of web server	860	1,726	3,984	4,961
hits per second,
khttpd
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008		Chapter 13 - Linux		182