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
