| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Ahsan Hadi <ahsan(dot)hadi(at)highgo(dot)ca> |
| Cc: | Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, thomas(dot)munro(at)gmail(dot)com, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Stephen Frost <sfrost(at)snowman(dot)net> |
| Subject: | Re: Append with naive multiplexing of FDWs |
| Date: | 2020-01-15 20:41:04 |
| Message-ID: | 20200115204104.GC7201@momjian.us |
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| Lists: | pgsql-hackers |
On Tue, Jan 14, 2020 at 02:37:48PM +0500, Ahsan Hadi wrote:
> Summary
> The patch is pretty good, it works well when there were little data back to
> the parent node. The patch doesn’t provide parallel FDW scan, it ensures
> that child nodes can send data to parent in parallel but the parent can only
> sequennly process the data from data nodes.
>
> Providing there is no performance degrdation for non FDW append queries,
> I would recomend to consider this patch as an interim soluton while we are
> waiting for parallel FDW scan.
Wow, these are very impressive results!
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
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