[[cli-tool-jvm-options-{tool-name}]]
[float]
==== JVM options

CLI tools run with 64MB of heap. For most tools, this value is fine. However, if
needed this can be overriden by setting the `CLI_JAVA_OPTS` environment variable.
For example, the following increases the heap size used by the
`pass:a[elasticsearch-{tool-name}]` tool to 1GB.

[source,shell,subs=attributes+]
--------------------------------------------------
export CLI_JAVA_OPTS="-Xmx1g"
bin/elasticsearch-{tool-name} ...
--------------------------------------------------