Hi Evan, I think this is why: 24 * 1.2g < 100g. I don't know the "huge pages" of the IBM JDK, but still you may config 16g in nodemanager.
Thanks. Drake 민영근 Ph.D kt NexR On Thu, Jan 14, 2016 at 2:53 PM, yaoxiaohua <[email protected]> wrote: > Hi guys, > > We use huge pages for linux, > > the total huge page memory is 16G. > > Our environment is > > 128G memory, > > 28 disks, > > 32(logical ) cpu > > > > Ibm jdk 1.7 > > Cdh2.3 > > Linux : overcommit 0 > > > > For one nodemanager, we give 100g total, and vcore :24. > > So I find that one nodemanager can assign 24 container at > the same time. > > And every container ‘s java opts is : > > -server -Xms1200m -Xmx1200m -Xlp -Xnoclassgc > -Xgcpolicy:gencon -Xjit:optLevel=hot > > -Xlp in ibm jdk is meaning use huge pages. > > > > My questions is that, when the cluster is busy, > > I found 24 containing is launched at same time, but we > just have 16G huge pages totoal, > > Why does this happened? 24 * 1.2g > 16G > > > > Thanks > > > > Best Regards, > > Evan > > >
