| From: | Amit Kapila <amit(dot)kapila(at)huawei(dot)com> |
|---|---|
| To: | "'Kyotaro HORIGUCHI'" <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp> |
| Cc: | <hlinnakangas(at)vmware(dot)com>, <noah(at)leadboat(dot)com>, <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Performance Improvement by reducing WAL for Update Operation |
| Date: | 2012-12-28 11:28:41 |
| Message-ID: | 00a301cde4ee$7d7a5150$786ef3f0$@kapila@huawei.com |
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| Lists: | pgsql-hackers |
On Friday, December 28, 2012 1:38 PM Kyotaro HORIGUCHI wrote:
> Hello, I saw this patch and confirmed that
>
> - Coding style looks good.
> - Appliable onto HEAD.
> - Some mis-codings are fixed.
>
> And took the performance figures for 4 types of modification versus 2
> benchmarks.
>
> As a whole, this patch brings very large gain in its effective range -
> e.g. updates of relatively small portions in a tuple, but negligible
> loss of performance is observed outside of its effective range on the
> test machine. I suppose the losses will be emphasized by the more
> higher performance of seq write of WAL devices
Thank you very much for the review.
With Regards,
Amit Kapila.
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