Re: CLUSTER, reform_and_rewrite_tuple(), and parallelism

From: Andres Freund <andres(at)anarazel(dot)de>
To: Peter Geoghegan <pg(at)heroku(dot)com>
Cc: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: CLUSTER, reform_and_rewrite_tuple(), and parallelism
Date: 2016-08-17 23:16:35
Message-ID: 20160817231635.jcnodx4ttemggahf@alap3.anarazel.de
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> Does anyone have any ideas on how to:
>
> 1). Directly address the reform_and_rewrite_tuple() bottleneck.

What part of is actually the expensive bit? It does a whole lot of
things. Forming/Deforming tuples, the hash lookups in
rewrite_heap_tuple(), ...?

Andres

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