This is only tested under an eclipse based Notes in Linux.
I changed the following, adjust the memory size to fit your system:
/opt/ibm/lotus/notes/framework/rcp/deploy/jvm.properties
vmarg.Xmx=-Xmx768m
vmarg.Xms=-Xms512m
I see the following files for sametime and Symphony, so probably the same jvm parameters for those but I have not tested them:
/opt/ibm/lotus/Sametime/rcp/deploy/jvm.properties
/opt/ibm/lotus/Symphony/framework/rcp/deploy/jvm.properties
