| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Ants Aasma <ants(at)cybertec(dot)at>, vignesh C <vignesh21(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Alastair Turner <minion(at)decodable(dot)me>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Parallel copy |
| Date: | 2020-05-12 04:12:33 |
| Message-ID: | CAA4eK1JmixfKY6c75WMkcSEy+sZpAQMPKkjc6HhLdaCDJpNc+g@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, May 11, 2020 at 11:52 PM Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>
> I wonder why you're still looking at this instead of looking at just
> speeding up the current code, especially the line splitting,
>
Because the line splitting is just 1-2% of overall work in common
cases. See the data shared by Vignesh for various workloads [1]. The
time it takes is in range of 0.5-12% approximately and for cases like
a table with few indexes, it is not more than 1-2%.
--
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com
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