ESGLinux wrote: > Hi, > > I´m reading a post about the memory use for a java application: > http://web.archive.org/web/20080313075240/http://goobsoft.homeip.net/Wiki.jsp?page=JavaDebianTuning > > and there is a thing that surprise me: > Read this and to the point where you understand that a 32-process on Linux > only has 2GB of addressible space. In fact, back in 1999, Linus decreed that > 32-bit Linux would never, ever support more than 2GB of memory. "This is not > negotiable." > > So I have a machine running RHEL x64 but I have a process that run over > only 32 bit (the JVM), Reading this I think my process only can use 2Gb of > memory. > > is it true? is it oficial documented anywhere? > > Thanks in advance, > > ESG No, the 32bit address space limit is 4GB, not 2GB. $ java -Xmx3500m -version java version "1.6.0_15" Java(TM) SE Runtime Environment (build 1.6.0_15-b03) Java HotSpot(TM) Server VM (build 14.1-b02, mixed mode) $ java -Xmx4500m -version Invalid maximum heap size: -Xmx4500m The specified size exceeds the maximum representable size. Could not create the Java virtual machine. If you want more address space than this use a 64bit JVM. Using a 64bit JVM then: $ java -Xmx4500m -version java version "1.6.0_17" Java(TM) SE Runtime Environment (build 1.6.0_17-b04) Java HotSpot(TM) 64-Bit Server VM (build 14.3-b01, mixed mode) -- Nigel Wade, System Administrator, Space Plasma Physics Group, University of Leicester, Leicester, LE1 7RH, UK E-mail : nmw@xxxxxxxxxxxx Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555 -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
