[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] Java JVM and memory on Xen
On Tue, Nov 10, 2009 at 8:52 PM, Rob Shepherd <rs@xxxxxxxxxxxxx> wrote: > 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? Java uses MORE memory then what you set on -Xmx. For example, I set -Xmx512m on an app and "top" shows 693MB RES, 1392M VIRT. Perhaps you disable swap so that all VIRT needs to be on memory, thus oom-killer killed it? > 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? It should be that way. -- Fajar _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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