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SRM Suite/EMC M&R [Watch4net]: How to change the memory heap for any modules. (304365)

Last Updated: 5/29/2020Categories: How toTotal Views: 2535Language:
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While this entry focuses mainly on Tomcat, it also applies to other Watch4net / SRM modules like the Backend or the Collector-Manager in the same way.

Memory allocation settings for APG Tomcat are located in an <operating_system>-service.properties file. The default  path of this file is:

Linux / Unix: /opt/APG/Web-Servers/Tomcat/Default/conf/unix-service.properties
Windows: C:\Program Files\APG\Web-Servers\Tomcat\Default\conf\win-service.properties

The following lines (memory.init & memory.max) specify the initial and maximum amount of memory Tomcat can use as Heap:

Example of the service.properties file:

#==============================================================================#
#         This property file only applies to the Tomcat Unix Service           #

#=========================
# Main Service Properties
#=========================
name=APG Tomcat (Default)
description=This service manages web-applications
startup=auto
start.order=96
stop.order=4

#==============================================
# Application Classpath, starting from index 1
classpath.1=bin/apg-health-logging.jar
classpath.2=bin/apg-logging-jul.jar
classpath.3=bin/tomcat-juli.jar
classpath.4=bin/propstore-api.jar
classpath.5=bin/component-loader.jar

#====================================
# Initial Java Heap Size (in MBytes)
#====================================
memory.init=64

#====================================
# Maximum Java Heap Size (in MBytes)
#====================================
memory.max=2048

#===================================================
# Additional Java Parameters, starting from index 1
jvm.param.1=-Djava.awt.headless=true
jvm.param.2=-XX:MaxPermSize=256m
jvm.param.3=-Dcatalina.base="$MODULE_HOME$"
jvm.param.4=-Dcatalina.home="$MODULE_HOME$"
jvm.param.5=-Djava.endorsed.dirs="$MODULE_HOME$"/endorsed
jvm.param.6=-Djava.io.tmpdir="$MODULE_HOME$"/temp
jvm.param.7=-Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.Jdk14Logger
jvm.param.8=-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
jvm.param.9=-Djava.util.logging.config.file="$MODULE_HOME$"/conf/logging.properties

#=====================================================================
# The service start and stop commands;
# they will be run inside the installation directory
# mode is one of 'java' or 'exec' - and also 'kill' for the stop mode
#=====================================================================
start.mode=java
start.target=com.watch4net.component.loader.util.ComponentLauncher
start.param.1=main

If you modify these values or any other value in the <operating_system>-service.properties file, do not forget to update the service to save these new settings permanently. Otherwise, they will not be taken into account. Here is the command to  a service (for Linux):

Linux / Unix: /opt/APG/bin/manage-modules.sh service update tomcat
Windows: C:\Program Files\APG\bin\manage-modules.cmd service update tomcat

Start Tomcat:

Linux / Unix: /opt/APG/bin/manage-modules.sh service start tomcat

Windows: C:\Program Files\APG\bin\manage-modules.cmd service start tomcat

Related Information

Starting with Watch4net 6.8u2, a centralized memory settings management UI has been introduced.
To change the memory settings for any java service, the following change can be made by opening the
following UI from centralized management:
Ex: to change the memory.max settings for Webservice-Gateway:

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