December 2006
Intermediate to advanced
166 pages
3h 59m
English
book
Java Stand-alone Applications on z/OS Volume II
by Alex Louwe Kooijmans, Jonathan M Barney, Patrick Bruinsma, Venugopal Kailaikurthi, Christian Strauer, Kenichi Yoshimura
Content preview from Java Stand-alone Applications on z/OS Volume II
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Chapter 8. Java problem determination 135
For more details about Dump Formatter, refer to Chapter 28 of IIBM
Developer Kit and Runtime Environment, Java 2 Technlogy Edition,
Version 5.0 Diagnostics Guide, SC34-6650:
http://download.boulder.ibm.com/ibmdl/pub/software/dw/jdk/diagnos
is/diag50.pdf
8.1.4 High CPU or performance problems
Various factors affect CPU usage or performance of an application. Users can
use the Resource Management Facility (RMF™) of z/OS to monitor CPU,
memory, and I/O device performance.
JVM heap sizing is one of the most important factors that can affect performance.
If the Java heap is not set properly, it can lead to excessive GC, fragmentation,
and paging, which affects the performance of the application. The output ...
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