Increase the memory allocation.
This can be done via Raw Configure.
If it is still at the default which is:
<startup>
options = -Xms128m -Xmx2048m -Duser.language=en -Duser.country=US
then double it to:
<startup>
options = -Xms256m -Xmx4096m -Duser.language=en -Duser.country=US