[PERFORM] Re: OLAP/reporting queries fall into nested loops over seq scans orother horrible planner choices

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От legrand legrand
Тема [PERFORM] Re: OLAP/reporting queries fall into nested loops over seq scans orother horrible planner choices
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Msg-id 1509720945908-0.post@n3.nabble.com
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Ответ на Re: [PERFORM] Re: OLAP/reporting queries fall into nested loops overseq scans or other horrible planner choices  (Gunther <raj@gusw.net>)
Ответы Re: [PERFORM] Re: OLAP/reporting queries fall into nested loops overseq scans or other horrible planner choices  (Gunther <raj@gusw.net>)
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To limit NL usage, wouldn't a modified set of Planner Cost Constants 
https://www.postgresql.org/docs/current/static/runtime-config-query.html
<https://www.postgresql.org/docs/current/static/runtime-config-query.html>  

seq_page_cost 
random_page_cost 
cpu_tuple_cost 
cpu_index_tuple_cost 
cpu_operator_cost 

be more hash join freindly (as Oracle' optimizer_index_cost_adj )?



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