Loading a dashboard with 5 visualizations takes 4x time with K7.9 than K7.4 (with exactly same indices and resources).
ES cluster has 3 nodes, all queries take no more than 1 seconde, but dashboard is loading on 10 secondes with Kibana 7.9.
By inspecting AJAX queries, I see K7.4 is using "msearch", whereas K7.9 is using async search. And in async search response, I see "took: 15000ms" !!! Thats really too much.
Is it normal ? Can I rollback to "msearch" strategy ?