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Configuring various JVM tuning parameters for Oracle E-Business suite 11i and R12 (Doc ID 567551.1)

Last updated on MAY 28, 2020

Applies to:

Oracle E-Business Suite Technology Stack - Version 11.5.10.2 to 12.0.5 [Release 11.5.10 to 12.0]
Information in this document applies to any platform.

Purpose

As various Oracle Applications E-Business suite version uses various J2SE platform versions, hence it becomes highly important to tune the JVM installed with the product for better performance of the Oracle applications. The document describes basics of Java Virtual Machine and various Behavioral, Performance and Debugging options that can be used to troubleshoot JVM tuning issues with E-Business Suite.

In E-Business 11i  the jserv.properties file ( present at $IAS_ORACLE_HOME/Apache/Jserv/etc directory)  or in  E-Business R12 the opmn.xml file ( present at $ORA_CONFIG_HOME/10.1.3/opmn/conf directory ) has entries realted to JVM settings as following.

The entries are just an example to explain the meaning of each parameter, hence all the parameter settings may not be present in those files at your instance.

 

wrapper.bin.parameters=-verbose:gc -hotspot -Xmx1024M -Xms256M 
-XX:NewSize=256m -XX:MaxPermSize=32M -XX:NewRatio=2 
-XX:+PrintGCTimeStamps -XX:+UseTLAB 
-XX:HeapDumpPath=/oracle/prodora/iAS/Apache/Jserv/logs 
-XX:+HeapDumpOnOutOfMemoryError   
-XX:+UseParallelGC -XX:ParallelGCThreads=2

Let us understand what each of those parameter stands for and the significance for each of those from JVM tuning prospective.

+ Command line options that are prefixed with -XX are Java HotSpotTM Virtual Machine specific options and these are important for performance tuning and diagnostic purposes.

+ Command line options that are prefixed with -X are non-standard and are subject to change without notice in subsequent releases of the JDK. 

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps

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