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@@ -51,3 +51,10 @@ also configure the path that JNA uses with the <<set-jvm-options,JVM flag>>
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temporary files by setting the `LIBFFI_TMPDIR` environment variable. Future
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versions of {es} may need additional configuration, so you should prefer to set
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`ES_TMPDIR` wherever possible.
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+
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+NOTE: {es} does not clear out the `/tmp` directory, as this could be an
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+unwelcome behavior in the event of a power outage or an Out of Memory error.
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+Instead, it's expected that temporary directories are cleaned out automatically
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+by the system on events such as a reboot. This is the behavior with the Linux
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+link:https://www.kernel.org/doc/html/latest/filesystems/tmpfs.html[tmpfs]
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+file system, for example.
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David Kilfoyle