Re: [HACKERS] Gather Merge

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От Andreas Joseph Krogh
Тема Re: [HACKERS] Gather Merge
Дата
Msg-id VisenaEmail.2a.7febb91868fbbb2.15ab77c9e61@tc7-visena
обсуждение исходный текст
Ответ на Re: [HACKERS] Gather Merge  (Rushabh Lathia <rushabh.lathia@gmail.com>)
Ответы Re: [HACKERS] Gather Merge  (Rushabh Lathia <rushabh.lathia@gmail.com>)
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På fredag 10. mars 2017 kl. 10:09:22, skrev Rushabh Lathia <rushabh.lathia@gmail.com>:
 
 
On Fri, Mar 10, 2017 at 2:33 PM, Andreas Joseph Krogh <andreas@visena.com> wrote:
[...]
The execution-plan seems (unsurprisingly) to depend on data-distribution, so is there a way I can force a GatherMerge?
 
Not directly. GatherMerge cost is mainly depend on parallel_setup_cost,
parallel_tuple_cost and cpu_operator_cost. May be you can force this
by setting this cost low enough. Or another way to force is by disable the
other plans.
 
What plan you are getting now? You not seeing the below error ?
 
ERROR:  GatherMerge child's targetlist doesn't match GatherMerge
 
I'm seeing the same error, it's just that for reproducing it I'd rather not copy my whole dataset.
 
--
Andreas Joseph Krogh

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