[ZOOKEEPER-4792] Tune the env log at the start of the process

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.9.1
• Fix Version/s: 3.10
• Component/s: server
• Labels: pull-request-available
• Assignee: Yan Zhao
• Reporter: Yan Zhao
• Created: 25/Jan/24 03:28
• Updated: 13/Feb/24 10:23
• Resolved: 07/Feb/24 07:37

Description

At the start of the process, it will print the env info in the log.
There are three logs for the memory metrics.

        // Get memory information.
        Runtime runtime = Runtime.getRuntime();
        int mb = 1024 * 1024;
        put(l, "os.memory.free", runtime.freeMemory() / mb + "MB");
        put(l, "os.memory.max", runtime.maxMemory() / mb + "MB");
        put(l, "os.memory.total", runtime.totalMemory() / mb + "MB");

https://github.com/apache/zookeeper/blob/9e40464d98319b4553d93b12c6d7db4d240bbce9/zookeeper-server/src/main/java/org/apache/zookeeper/Environment.java#L88-L90

It's misleading for the user, use jvm as the prefix will be better.

Change to:

        // Get memory information.
        Runtime runtime = Runtime.getRuntime();
        int mb = 1024 * 1024;
        put(l, "jvm,.memory.free", runtime.freeMemory() / mb + "MB");
        put(l, "jvm.memory.max", runtime.maxMemory() / mb + "MB");
        put(l, "jvm.memory.total", runtime.totalMemory() / mb + "MB");

Issue Links

• links to: GitHub Pull Request #2112