I’m slightly surprised there isn’t more KVM/Virtualized bare metal JVM environments. While I haven’t used it in a while, the decade+ I spent running Javan’s in

I’m slightly surprised there isn’t more KVM/Virtualized bare metal JVM environments. While I haven’t used it in a while, the decade+ I spent running Javan’s in production basically have the entire system over to the JVM (with some overhead for some small non-JVM background daemons). Most things were built not to use POSIX standards, but Java equivalents. Occasionally direct file system access for writes was necessary (logging being a big exception). So giving the entire system to the JVM, performing some warmup prior to a service considering itself “healthy”, and the JVM was reasonably fast. It devoured memory and you couldn’t really do anything else with the host, but you got the Java ecosystem, for better or worse). There was a lot of good tooling that is missing from other platforms, but also a ton of overhead that I am happy to not have to deal with at the moment.