Install
(For Java11at least version 1.5 is needed) Download Async Profiler from: https://github.com/jvm-profiling-tools/async-profiler
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echo 1 > /proc/sys/kernel/perf_event_paranoid echo 0 > /proc/sys/kernel/kptr_restrict |
Usage
Find the HiveMQ process id (must be user root or user hivemq)
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/opt/async-profiler/profiler.sh -d 600 -f /opt/hivemq/flamegraph.svg `ps -u hivemq -o pid=` |
Kubernetes / Docker
As usual, container platforms have some paranoid settings that are read-only. On the up side, we can leverage the fact that HiveMQ is always PID 1 in containers (unless shared namespaces are used in K8s):
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Then use kubectl cp or docker cp to copy the graph from the container.
systemd
Alternative: When using systemd, you can simply use
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