On a Elasticsearch and Kibana cluster that is monitoring another Elasticsearch cluster, we found that the size of the ".async_search" index on the monitoring cluster is growing fast (about 2GB in only one hour) in a very low system use scenario.
The only current use in this monitoring cluster is the execution of some KQL queries over the “filebeat*” index. For this reason, we believe that this index is storing temporary data for supporting Kibana queries. ¿What is the purpose of this index? ¿Is there any way to manage how works in terms of reducing used space?
Elasticsearch and Kibana 7.9.3.
Thanks in advance.