How to know the off-heap memory usage
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Description
How to know the off-heap memory usage ?is there any api that mapdb offers? here is my JVM start parameters:
java -server -Xms4096m -Xmx4096m -XX:MaxDirectMemorySize=4G -XX:MaxTenuringThreshold=15 -XX:+PrintGCDateStamps -XX:+PrintGCDetails -Xloggc:./gc.log -jar ./offheap-benchmark.jar
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with MapDB's public API and documentation, using the offheap-benchmark.jar entry point and the supplied JVM direct-memory settings as context. Confirm whether MapDB exposes off-heap usage metrics and document how users can obtain or estimate that usage; the answer should address the API question directly.
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Assessment
- Tech stack
- java
- Domain
- databases
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100