Re: Fast insertion indexes: why no developments

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От Leonardo Francalanci
Тема Re: Fast insertion indexes: why no developments
Дата
Msg-id 1384352993322-5778150.post@n5.nabble.com
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Ответ на Re: Fast insertion indexes: why no developments  (Simon Riggs <simon@2ndQuadrant.com>)
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Simon Riggs wrote
> From our discussions here, IMHO there is a strong case for avoiding
> btrees completely for larger historical data tables. That isn't
> something I had even considered as desirable before this conversation
> but ISTM now that taking that approach will be more fruitful than
> attempting to implement LSM trees.

Eh? I don't understand this point. How can I avoid btrees, and
searching by caller_id? I don't get it...


Simon Riggs wrote
> Alvaro has given me some results for his patch. The figures I have are
> for a 2GB table.
> 
> Index Build Time
> MinMax 11 s
> Btree   96s
> 
> Index Size
> MinMax 2 pages + metapage
> Btree approx 200,000 pages + metapage
> 
> Load time
> MinMax no overhead, same as raw COPY
> BTree - considerably slower

Great!!! This looks very promising. Were the values indexed
sequential?




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