This may or not be related. But I recently found that using Tomahawk tags (dataList, dataTable) in my Seam/EJB3 was causing serious PermGen memory leak problems. I replaced both with other MyFaces and Seam components and my problem went away. Granted, the Seam documentation now recommends against using Tomahawk tags, so consider this a re-affirmation. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4040366#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...