Re: HOT - preliminary results

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От Pavan Deolasee
Тема Re: HOT - preliminary results
Дата
Msg-id 45E7CBAC.9090100@enterprisedb.com
обсуждение исходный текст
Ответ на Re: HOT - preliminary results  ("Zeugswetter Andreas ADI SD" <ZeugswetterA@spardat.at>)
Ответы Re: HOT - preliminary results  (Bruce Momjian <bruce@momjian.us>)
Список pgsql-hackers
Zeugswetter Andreas ADI SD wrote:
>>> accounts       157895  (initial size)       49284 (increase)
>>> accounts_pkey  19709   (initial size)       19705 (increase)
>>>
>>>
>> Just to clarify, the relation size and increase is in number
>> of blocks.
>
> The numbers are quite impressive :-) Have you removed the selects on
> accounts too ?

Yes. In the first set of results, SELECT on accounts is removed.

> Seems that should also show improvements.
>
> Do you prune chains during update also ?

Yes, we do prune the chains during UPDATE, but only when we
run out of free space and LP_DELETEd items on the page.
And we prune all chains on the page in that case.


Thanks,
Pavan




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