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Clarify heap setting in Docker docs #42754

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4 changes: 4 additions & 0 deletions docs/reference/setup/install/docker.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -372,6 +372,10 @@ published ports with `--publish-all`, unless you are pinning one container per h

. Use the `ES_JAVA_OPTS` environment variable to set heap size. For example, to
use 16GB, use `-e ES_JAVA_OPTS="-Xms16g -Xmx16g"` with `docker run`.
+
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NOTE: You still need to configure the heap size even if you are https://docs.docker.com/config/containers/resource_constraints/#limit-a-containers-access-to-memory[limiting memory access] to the container.
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Suggest linking to the "setting the heap size" page, and formatting for width:

Suggested change
NOTE: You still need to configure the heap size even if you are https://docs.docker.com/config/containers/resource_constraints/#limit-a-containers-access-to-memory[limiting memory access] to the container.
NOTE: You still need to <<heap-size,configure the heap size>> even if you are
https://docs.docker.com/config/containers/resource_constraints/#limit-a-containers-access-to-memory[limiting
memory access] to the container.

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Thanks! Addressed in 274917c

--

. Pin your deployments to a specific version of the {es} Docker image, for
example +docker.elastic.co/elasticsearch/elasticsearch:{version}+.
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