Performance issue in my elastic search cluster

Elastic Stack Elasticsearch
5

@spinscale

Yes, I already used that. Pasting here the partial output of that

    ::: {data-node}{P24qlH20RGKKSIjDYvU6qw}{tQEJ-pcVTHqgWcnTK1v5xQ}
   Hot threads at 2019-08-28T11:02:33.604, interval=500ms, busiestThreads=3, 
 ignoreIdleThreads=true:

    45.3% (226.4ms out of 500ms) cpu usage by thread 'elasticsearch[data-node][search][T#1]'
     5/10 snapshots sharing following 20 elements
       app//org.apache.lucene.search.Weight$DefaultBulkScorer.score(Weight.java:214)
       app//org.apache.lucene.search.BulkScorer.score(BulkScorer.java:39)
       app//org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:670)
     app//org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:191)
   app//org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:471)
   app//org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:276)
   app//org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:114)
   app//org.elasticsearch.search.SearchService.loadOrExecuteQueryPhase(SearchService.java:351)
   app//org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:398)
   app//org.elasticsearch.search.SearchService.access$100(SearchService.java:126)
   app//org.elasticsearch.search.SearchService$2.onResponse(SearchService.java:360)
   app//org.elasticsearch.search.SearchService$2.onResponse(SearchService.java:356)
   app//org.elasticsearch.search.SearchService$4.doRun(SearchService.java:1117)
   app//org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:759)
   app//org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)
   app//org.elasticsearch.common.util.concurrent.TimedRunnable.doRun(TimedRunnable.java:41)
   app//org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)
   java.base@11.0.1/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
   java.base@11.0.1/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
   java.base@11.0.1/java.lang.Thread.run(Thread.java:834)