News for hackers. Stuff that matters.

A comment on Running Java in a Container. Parent comment

Re:Running Java in a Container by techman9 on Wednesday March 21, 2018 @12:51AM (#16635564)
How does the JVM determine the number of cores on a Linux system by default?
[ Parent | on HN ]
Re:Running Java in a Container by joerg84 on Wednesday March 21, 2018 @07:35AM (#16637115)
One of the authors here: This is the OpenJDK 8 implementation: http://hg.openjdk.java.net/jdk8/jdk8/hotspot/file/tip/src/os...
[ Parent | on HN ]
Re:Running Java in a Container by kev009 on Wednesday March 21, 2018 @12:55AM (#16635584)
I don't know the precise answer off hand, but probably in an OS dependent code path in OpenJDK. I know for instance OpenJDK uses the global sysctl API to get total RAM on a FreeBSD machine. To use jails as multi-tenancy system you therefore want to fake that API out to the resource controled max for the jail.
[ Parent | on HN ]