How to parameterize JVM arguments in the StreamBase Engine configuration
Article ID: KB0071504
Updated On:
| Products | Versions |
|---|---|
| TIBCO Streaming | 10.6 and later |
Description
This article describes how to parameterize the JVM arguments for a Streaming application for different environments (e.g. dev/UAT/prod).
Issue/Introduction
This article outlines an approach for parameterizing JVM arguments for a StreamBase Engine. This can be done in the HOCON configuration file.
Resolution
JVM arguments can be hard-coded into a StreamBase Engine HOCON configuration file. For example..
Note that each argument is separated from the others via double-quotes.
In this case, you may represent each JVM argument in a substitution variable. Substitution variables are discussed further in the Help under Home > Configuration Guide > HOCON Configuration Introduction > HOCON Substitution Variables.
For example:
Using the above configuration, you could, for example, change the max heap size (-Xmx) to 4g. This would override the default value of 3g. This can be set when the node is installed. For example:
jvmArgs = [ "-Xmx3g" "-Xms512m" "-XX:+UseG1GC" "-XX:MaxGCPauseMillis=500" "-XX:ConcGCThreads=1" ]
Note that each argument is separated from the others via double-quotes.
In this case, you may represent each JVM argument in a substitution variable. Substitution variables are discussed further in the Help under Home > Configuration Guide > HOCON Configuration Introduction > HOCON Substitution Variables.
For example:
jvmArgs = [
${JVM_ARG_1:-"-Xmx3g"}
${JVM_ARG_2:-"-Xms512m"}
${JVM_ARG_3:-"-XX:+UseG1GC"}
${JVM_ARG_4:-"-XX:MaxGCPauseMillis=500"}
${JVM_ARG_5:-"-XX:ConcGCThreads=1"}
]
Using the above configuration, you could, for example, change the max heap size (-Xmx) to 4g. This would override the default value of 3g. This can be set when the node is installed. For example:
epadmin install node --nodename my.node --nodedirectory nodes --application app-archive.zip --substitutions "JVM_ARG_1=-Xmx4g"
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