[GitHub] [lucene-solr] mikemccand commented on issue #877: LUCENE-8978: Maximal Bottom Score Based Early Termination

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mikemccand commented on issue #877: LUCENE-8978: Maximal Bottom Score Based Early Termination
URL: https://github.com/apache/lucene-solr/pull/877#issuecomment-531346943
 
 
   > I ran luceneutil with concurrent mode and wikimedium2m -- no degradation to QPS and some tasks show a reduction of around 30% in latencies.
   
   We have to be careful interpreting luceneutil results: it does not run a true "red-line" (capacity) test.  When it reports QPS, that's the result of N threads running random queries over and over, not necessarily saturating CPU/IO on the server you are testing on.
   
   In fact, it's odd you didn't see a QPS gain when you saw latency improvements -- those latency gains should have meant the search threads run more queries per second, hmm.

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