Re: Re: patch submission: truncate trailing nulls from heap rows to reduce the size of the null bitmap [Review]

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От Simon Riggs
Тема Re: Re: patch submission: truncate trailing nulls from heap rows to reduce the size of the null bitmap [Review]
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Msg-id CA+U5nMJgbpT67cft5FyCcyz2LUV5Zv+doo6yip7e8cs0r71X0g@mail.gmail.com
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Ответ на Re: Re: patch submission: truncate trailing nulls from heap rows to reduce the size of the null bitmap [Review]  ("Kevin Grittner" <kgrittn@mail.com>)
Ответы Re: Re: patch submission: truncate trailing nulls from heap rows to reduce the size of the null bitmap [Review]  (Amit Kapila <amit.kapila@huawei.com>)
Re: patch submission: truncate trailing nulls from heap rows to reduce the size of the null bitmap [Review]  (Noah Misch <noah@leadboat.com>)
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On 24 December 2012 16:57, Amit Kapila <amit.kapila@huawei.com> wrote:

> Performance: Average of 3 runs of pgbench in tps
> 9.3devel  |  with trailing null patch
> ----------+--------------------------
> 578.9872  |   573.4980

On balance, it would seem optimizing for this special case would
affect everybody negatively; not much, but enough. Which means we
should rekect this patch.

Do you have a reason why a different view might be taken?

-- Simon Riggs                   http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services

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