Multiple Java servlets in one container? – Info Java

Not even sure if I worded the title correctly, but here’s my question. I have a Scientific Linux 7 server that runs OpenFire as an XMPP chat server, and also runs Yacy to perform file searches. I’m wondering if there is a way to run both Yacy and OpenFire from one Java server (container?)? I’ve got 16GB of RAM in this server, Yacy is using 4.5GB of RAM and OpenFire is using 3.8GB. I’ve set the Xms and Xmx to 128 and 256. How can I reduce the memory usage to something more reasonable? Thanks!