Elasticsearch creates directories inside
/tmp. These directories used to execute native code by
libffi. Most of the time these directories are empty and have the name like
elasticsearch.KNoHBn19. more info here.
When running Elasticsearch for years it filled up
/root directory due to the directories created by Elasticsearch in the
/tmp. To override this, I can point Elasticsearch tmp directory to another disk via setting
ES_TMPDIR. But still have thousands of empty directories.
Is it safe to remove these old empty directories created by Elasticsearch? Or Elasticsearch will use all the empty directories created in tmp.