From: Ian Pushee <ian@intuvisiontech.com>
To: pgsql-performance@postgresql.org
Subject: Re: Slow query (planner insisting on using 'external merge' sort type)
Date: Fri, 19 Jun 2015 10:53:43 -0400
Message-ID: <55842CF7.6080007@intuvisiontech.com> (raw)
In-Reply-To: <A76B25F2823E954C9E45E32FA49D70ECCD489D78@mail.corp.perceptron.com>
References: <55842859.4060102@intuvisiontech.com>
<A76B25F2823E954C9E45E32FA49D70ECCD489D78@mail.corp.perceptron.com>
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On 6/19/2015 10:46 AM, Igor Neyman wrote:
>
> Probably events_confidnce index is not very selective, that's why optimizer prefers seq scan.
> I'd try to create an index on (name, eventspy_id, camera_id, type, status).
>
> Also, the recent 9.2 is 9.2.13, you should upgrade.
>
> Regards,
> Igor Neyman
Hi Igor,
I already have an index for (name, eventspy_id, camera_id, type,
status)... that is the index being used (apparently silently) when I set
random_page_cost=1.0.
Thanks,
-Ian
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To: pgsql-performance@postgresql.org
Cc: ian@intuvisiontech.com
Subject: Re: Slow query (planner insisting on using 'external merge' sort type)
In-Reply-To: <55842CF7.6080007@intuvisiontech.com>
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