| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Paul Ramsey <pramsey(at)cleverelephant(dot)ca>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Julien Rouhaud <julien(dot)rouhaud(at)dalibo(dot)com>, James Sewell <james(dot)sewell(at)lisasoft(dot)com>, David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Andreas Ulbrich <andreas(dot)ulbrich(at)matheversum(dot)de> |
| Subject: | Re: Choosing parallel_degree |
| Date: | 2016-04-11 21:45:59 |
| Message-ID: | CANP8+jJZ-eM7coWfJOqqdELBrd_ixNeTTC3Y_SVJqq7Pr0z8qA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 8 April 2016 at 17:49, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> With the patch, you can - if you wish - substitute
> some other number for the one the planner comes up with.
I saw you're using AccessExclusiveLock, the reason being it affects SELECTs.
That is supposed to apply when things might change the answer from a
SELECT, whereas this affects only the default for a plan.
Can I change this to a lower setting? I would have done this before
applying the patch, but you beat me to it.
--
Simon Riggs http://www.2ndQuadrant.com/
<http://www.2ndquadrant.com/>
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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