View source for Heap Space Memory Management How to guide

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[[Category:Pinsafe]]

= Overview =

This document outlines how to configure how much memory is used within Apache Tomcat. It may be useful when running multiple instances of Swivel.


= Prerequisites =

Swivel 3.x

Apache Tomcat


= PINsafe Appliance =

Login to the Command line through the [[CMI]] and verify the memory being used with the command ''top''

The heap space value should be set already, but you can verify and if necessary set the values, see [[WinSCP How To Guide]].

To increase the Heap Space of a Swivel appliance you need to edit catalina.sh in the /usr/local/apache-tomcat-5.5.20/bin folder Add the line at the start of the file after the comments

JAVA_OPTS="$JAVA_OPTS "-Xmx192m

You should be able to keep adding heap. We have tested over half a Gb of heap (-Xmx512m)



= Additional Commands =


== Memory Usuage ==

cat /proc/meminfo


== Freeing up Memory Cache ==

frees up page cache, dentries and inodes:

sh -c "sync; echo 3 > /proc/sys/vm/drop_caches"


= Testing =


= Known Issues =



= Troubleshooting =