Increase the JVM for the FAS App Server component

FAS JVM settings

The  JVM settings dictate how much memory is allocated to the java processes for the app server. A default FAS installation will have the JVM parameters set to:

 -XX:PermSize=256m -XX:MaxPermSize=256m -Xms256m -Xmx512

512mb may not be enough for some scenarios, for production systems it's recommended you increase this to at least 2048mb.

To increase the JVM settings

edit /opt/cafex/FAS-<version>/domain/configuration/domain.xml

Set the heap size to 2048 & 4096 as highlighted below

<server-groups>
<server-group name="main-server-group" profile="ha">
<jvm name="main-jvm">
<heap size="1024m" max-size="2048m"/>
<permgen size="256m" max-size="256m"/>
<jvm-options>
<option value="-server"/>
<option value="-XX:+UseG1GC"/>
<option value="-XX:MaxGCPauseMillis=50"/>
<option value="-XX:+HeapDumpOnOutOfMemoryError"/>
<option value="-XX:HeapDumpPath=./heapdump_as.hprof"/>
</jvm-options>
</jvm>

Then restart FAS:

service fas restart/systemctl restart fas

You can confirm the settings with:

ps -ef | grep appserver

root      8342  8272 44 13:15 pts/0    00:00:29 /opt/java/bin/java -D[Server:appserver-cs-palettes] -XX:PermSize=256m -XX:MaxPermSize=256m -Xms1024m -Xm2048m-