Here are the recommended hardware and memory requirements for your in-house server.

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set JAVA_OPTS=-Xms128m -Xmx512m -Djava.awt.headless=true -Dfrevvo.users.path="%CATALINA_HOME%\..\data\users"

Live Forms as a Windows service

If you are running  as a Windows service, you will have to edit frevvo/tomcat/bin/service.bat line to increase the Java Heap and Permgen spaces. Here is an example of the line you need to edit in that file:

"%EXECUTABLE%" //US//%SERVICE_NAME% ++JvmOptions "-XX:MaxPermSize=156m;-XX:+UseConcMarkSweepGC;-XX:+CMSClassUnloadingEnabled;-Djava.io.tmpdir=%CATALINA_BASE%\temp;-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager;-Djava.util.logging.config.file=%CATALINA_BASE%\conf\logging.properties;-Dfile.encoding=UTF-8;-Djava.awt.headless=true" --JvmMs 256 --JvmMx 1024

See the documentation on Tomcat Windows Service for more details.

After making these modifications to the service.bat file, you must Remove/Reinstall Live Forms as a Windows service for the changes to take effect.

Insight Server Memory Settings

The Insight Server, needed for the  Reports feature,  By default, the <frevvo-home>\solr-5.4.1\bin\solr script,sets the maximum Java heap size to 512M (-Xmx512m) in the <frevvo-home>\solr-5.4. 1\bin/solr script  by default.. This may not be sufficient especially when reporting on/indexing a large number of submissions. IT It may cause "out of memory" exceptions .The in the  <frevvo-home>solr-5.4.1\server\logs\solr.log file. The JVM heap size can be changed by uncommenting the increased to resolve this. Make sure that the machine where the Insight Server is installed has enough memory to accommodate your changes.

Follow these steps:

1. Stop the Insight Server.
2. Uncomment the set SOLR_JAVA_MEM

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1.  statement in the OS specific solr.in.* file (cmd for windows, sh for linux)

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1. .
2. Change the values.
   For example, to increase the max heap size to 1G use: -Xms512m –Xmx1g. For *nix OS, make sure SOLR_HEAP is commented out.
3. Restart the Insight Server.
    

#REM Increase Java Min/Max Heap as needed to support your indexing / query needs
#SOLR_HEAP="512m"

# Expert: If you want finer control over memory options, specify them directly
# Comment out SOLR_HEAP if you are using this though, that takes precedenceset SOLR_JAVA_MEM="-Xms512m -Xmx1g"Xmx512m

Troubleshooting

Solutions for memory errors are discussed below. 

Out of Memory Errors in frevvo.log

If you see "Out of Memory" errors in the <frevvo-home>\tomcat\logs\frevvo.log, implement the solutions listed here:

OutOfMemoryError: Java heap space

SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.OutOfMemoryError: Java heap space

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For example: -Xms512m to -Xmx1g. Make sure also that the machine where  is installed has enough memory installed. If you change -Xmx to 1g your machine will need more then 1g ram.

OutOfMemoryError: PermGen space

MemoryError: PermGen space
java.lang.OutOfMemoryError: PermGen space

Java has a fixed space allocated for classes and other statics that is usually enough in normal cases, but could be quickly filled up if there is on the fly code generation or significant business logic in your forms.

To solve this edit setenv.[bat,sh] increase the maximum perm size via the paramenter: -XX:MaxPermSize

For example: -XX:MaxPermSize=128M

Out of Memory Errors in the Insight Server log:

The insight server has its own log file under <frevvo-home>solr-5.4.1\server\logs. If you see an Out of Memory exception in this log, review Insight Server Memory Settings to change the Insight Server heap size.

This is independent of  which has its own log and its own heap size.

set CATALINA_OPTS=%CATALINA_OPTS% -Xms256m -Xmx1024m