Question

4

OpenJDK default options to always use the server VM

rated 0 times [ 4] [ 0] / answers: 1 / hits: 10848 / 2 Years ago, sun, march 6, 2022, 11:44:16

I got a warning message:

jvm uses the client vm, make sure to run java with the server vm for best performance by adding -server to the command line

In fact, when i run java -version i get:

OpenJDK Runtime Environment (IcedTea7 2.3.2) (7u7-2.3.2a-0ubuntu0.12.04.1)

OpenJDK Client VM (build 23.2-b09, mixed mode, sharing)

How does one go about and change OpenJDK's defaults to always start under the server VM?

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lishrag

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1 Year ago

answered 2 Years ago panshow · Accepted Answer

Assuming you have both the client and server VM installed, you just need to change the order of the lines in jvm.cfg to make -server first. You can find jvm.cfg like this:

find $(dirname $(dirname $(readlink -f $(which java)))) -name jvm.cfg

On my machine, it's /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/amd64/jvm.cfg.