Installation Guide for IBM DB2 with Red Hat JBoss

10.3

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Configure Java Virtual Machines

To configure a Java Virtual Machine (JVM), set Java options by using the JAVA_OPTS environment variable.

You can set the Java options in the following file:

On UNIX.

JBoss installation directory

>/bin/standalone.conf

On Windows.

JBoss installation directory

>\bin\standalone.conf.bat

The following table describes the Java options settings:

Java Options	Description
-server	Results in a slower startup but subsequent operations are faster.
-Ddb2.jcc.charsetDecoderEncoder	Required to use the MDM Hub Sample Operational Reference Store. Enables the JDBC driver to return the Unicode replacement character (U+FFFD) in place of a sequence of bytes that is not a UTF-8 string. Set to 3 .
-Djava.net.preferIPv4Stack	Specifies whether Java uses Internet Protocol version 4 (IPv4). If the operating system uses Internet Protocol version 6 (IPv6), set to true .
-Djboss.as.management.blocking.timeout	Time in seconds to wait for JBoss to deploy. To ensure that JBoss does not fail to start, you can set the value to 5000 . Adjust the time period based on your environment. Default is 300 . If you do not configure the parameter, you might encounter a JBoss deployment timeout.
-Djavax.net.ssl.trustStore=<Security certificate key file path> -Djavax.net.ssl.trustStorePassword=<keystore password>"	Imports the security certificate. Required if you want to configure the HTTPS protocol for the MDM Hub communications and for the ActiveVOS communications with the MDM Hub. Before you configure the property, use the Java keytool command to generate a keystore and an alias. If you use a certificate chain, the alias of the end-user certificate must be the same as the application server host name.
-Djgroups.bind_addr	Interface on which JGroup must receive and send messages. Required in multinode or cluster environments. Ensure that each node binds to its own network interface.
-DFrameworksLogConfigurationPath	Path to the log4j.xml file.
-Dmdm.node.groupid	Specifies a group ID for Java Virtual Machines in the MDM Hub implementation. Required only if you want logical groupings of Hub Servers and Process Servers.
-Dfile.encoding -Dorg.apache.catalina.connector.URI_ENCODING	Required if you want to use Informatica Data Director and use REST APIs to search for records. Set both the Java options to UTF-8 to ensure that you can find and save records that contain UTF-8 characters.
-Dorg.apache.coyote.http11.Http11Protocol.MAX_HEADER_SIZE	Maximum size of the HTTP headers, in bytes. The smart search requests might fail if the header size is low. Set to 16384 .
-Dtask.pageSize=<maximum number of tasks>	Specifies the maximum number of ActiveVOS tasks that are retrieved for each request. Default is 5000 . Increase the number if your environment has a large number of tasks.
-Dstricttransportsecurity.flag	Specifies whether web browsers must convert all attempts to access Informatica Data Director using the HTTP requests to the HTTPS requests instead. Set to true .
-Xms	Initial heap size. Set to 2048m .
-Xmx	Maximum JVM heap size. Set to 4 GB or higher. For example, to set the -Xmx to 4096m , use the following JAVA_OPTIONS environment variable setting: set "JAVA_OPTIONS=-server ... -Xmx4096m"
XX:+UseCodeCacheFlushing	Specifies whether the JVM disposes of compiled code when the code cache is full.
-XX:ReservedCodeCacheSize	JIT code cache size. To enhance the performance of the MDM Hub environment, set to 512m .

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Table of Contents

Installation Guide for IBM DB2 with Red Hat JBoss

Installation Guide for IBM DB2 with Red Hat JBoss

Configure Java Virtual Machines

Configure Java Virtual Machines