[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-users] Java JVM and memory on Xen
Hi, I have a strange problem here.My Java Virtual Machine crashes on a DomU when mem-set is 1792 MB but is stable when mem-set has been called with 1791 MB This happens running JBoss, and is an actual libjvm.so Segfault. It doesn't report anything about memory etc. Running: very recent quad core Xeon 2Ghz, Xen 3.1 from OpenSolaris 09/06 OpenSolaris 09/06 Dom0 Ubuntu 8.04 with 2.6.24-25-xen kernel image JVMs (any... 1.5.0 - 1.7, either openjdk or sun) I finally tracked down the crash to that single 1MB adjustment of RAM. although the JVM is only configured to use 512MB of RAM MAX (-Xmx512m)This is very bizarre. Has anybody seen behaviour before, or have any comments about why it may be happening? One thought.... Java requires contiguous memory which I believe Xen does not provide to the guest. I would have thought however that the addressable memory space that an application sees can be mapped to appear contiguous? Thanks for any input, or suggestions Rob -- Rob Shepherd BEng PhD - Director / Senior Engineer - DataCymru Ltd _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |