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WebSphere Application Server V8.5 Administration and Configuration Guide for the Full Profile
book

WebSphere Application Server V8.5 Administration and Configuration Guide for the Full Profile

by Fabio Albertoni, Tanja Baumann, Yogesh Bhatia, Eduardo Monich Fronza, Marcio da Ros Gomes, Sebastian Kapciak, Catalin Mierlea, Sergio Pinto, Anoop Ramachandra, Liang Rui, Miguel Troncoso
July 2013
Intermediate to advanced content levelIntermediate to advanced
1152 pages
34h 57m
English
IBM Redbooks
Content preview from WebSphere Application Server V8.5 Administration and Configuration Guide for the Full Profile
Chapter 17. Performance tuning 613
<vmarg name="-Xlp" />
17.5 JVM tuning
This section provides basic tuning tips for JVM performance.
17.5.1 Default garbage collection
WebSphere Application Server for z/OS V8.5 changes the default policy from using the
optthruput option to using the gencon option, which was introduced with IBM Java 5.
With the optthruput option, all objects were allocated from one large contiguous heap that
was shared by all threads. When a garbage collection was invoked, the entire heap was
scanned, and unreferenced objects were marked and swapped. This option was best for
applications that required optimal throughput but intr ...
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Publisher Resources

ISBN: 0738438537Purchase bookAdditional Material