| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila(at)huawei(dot)com> |
| Cc: | Kevin Grittner <kgrittn(at)mail(dot)com>, robertmhaas(at)gmail(dot)com, josh(at)agliodbs(dot)com, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Re: patch submission: truncate trailing nulls from heap rows to reduce the size of the null bitmap [Review] |
| Date: | 2013-01-09 11:22:06 |
| Message-ID: | CA+U5nMJgbpT67cft5FyCcyz2LUV5Zv+doo6yip7e8cs0r71X0g@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 24 December 2012 16:57, Amit Kapila <amit(dot)kapila(at)huawei(dot)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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