> From: Martin Gainty [mailto:mgai...@hotmail.com] > Subject: RE: MaxPermSize / Threads > > could you describe compressed object pointers and how implementation > will reduce allocations from JVM heap?thx,
It doesn't reduce the number of allocations, but it does reduce the size of objects, since each object reference is kept in 32 bits instead of 64. For heaps larger than 4 GB, some CPU time is spent (de)compressing the references to and from pointers. http://wikis.sun.com/display/HotSpotInternals/CompressedOops - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
