Documentation feedback on /docs/admin/troubleshooting/jcmd/docker.rst

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Documentation feedback

• Page title: Using jcmd with CrateDB on Docker
• Page URL: https://cratedb.com/docs/guide/admin/troubleshooting/jcmd/docker.html
• Source: https://github.com/crate/cratedb-guide/blob/main/docs/admin/troubleshooting/jcmd/docker.rst

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The page talks exclusively about Docker, but could be generalized to containerized deployments to also cover crate-operator deployments.
Commands look slightly different for kubectl. Example:

# JFR Docker
docker exec -it --user=crate cratedb /crate/jdk/bin/jcmd 1 JFR.start name=recording1 duration=60s filename=/data/recording1.jfr

# JFR kubectl (--user parameter becomes su)
kubectl exec -it -n 6d1f152b-4ac1-459e-9a6c-96557c703872 crate-data-hot-f4ae0c70-1438-46cf-a577-abff62c3593a-0 -c crate -- su crate -c "/crate/jdk/bin/jcmd 1 JFR.start name=recording1 duration=60s filename=/data/recording1.jfr"