see https://metrics.gwdg.de/d/000000166/dariah-de-and-textgrid-repository?orgId=6&from=1579366486107&to=1610988886108&var-server=textgrid-esx2.gwdg.de&var-inter=$__auto_interval_inter&var-jolokia_name=All&var-elastic_node=All&var-publikator_stats=All&var-tomcat_threads=All&var-tomcat_requests=All&var-jolokia_load=All&var-jolokia_heap=All&theme=light