Elasticsearch version: 7.2.0
JVM version: Build-in JDK12
OS version: CentOS 7.3
I have a index with join field, heap usage will raise to 90%+ when doing has_child query.
MAT report shows
org.elasticsearch.indices.IndicesQueryCache$ElasticsearchLRUQueryCache consume 80%+ heap size.
what is the reason that ElasticsearchLRUQueryCache would larger then 10% of heap size and cause oom problem?