Added Java NMT, Debug & JMX Helpers #130
Merged
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary
This PR adds support for Java Native Memory Tracking (NMT), JMX & Remote Debug features present in libjvm
A helper has been added for each feature:
NMT
Flags added:
"NMT_LEVEL_1=summary" - required to enable NMT successfully due to JDK bug
"-XX:+UnlockDiagnosticVMOptions"
"-XX:NativeMemoryTracking=summary" - (summary report of memory usage)
"-XX:+PrintNMTStatistics" - (prints memory usage data at VM exit)
Configuration:
BPL_JAVA_NMT_ENABLED=false
at runtime.BPL_JAVA_NMT_LEVEL
which defaults to 'summary' and can be set to 'detail'JMX
Flags added:
"-Djava.rmi.server.hostname=127.0.0.1"
"-Dcom.sun.management.jmxremote.authenticate=false"
"-Dcom.sun.management.jmxremote.ssl=false"
Configuration:
BPL_JMX_ENABLED=<true/false>
- false by defaultBPL_JMX_PORT=<port>
- configure the port valueDebug
Flags added:
-agentlib:jdwp=transport=dt_socket,server=y,address=<*:port>,suspend=<true/false>
BPL_DEBUG_ENABLED=<true/false>
- false by default.BPL_DEBUG_PORT=<port>
- 8000 by default.BPL_DEBUG_SUSPEND=<true/false>
- suspend execution, false by default.Use Cases
Checklist