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From: Justin Pryzby <pryzby@telsasoft.com>
To: Jamie Thompson <jthompson.neuk@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Please help! Query jumps from 1s -> 4m
Date: Mon, 4 May 2020 14:12:01 -0500
Message-ID: <20200504191201.GU28974@telsasoft.com> (raw)
In-Reply-To: <CABoe=cQQtDyXFcjo3iAg1Va=xdseQeTBgoezoLLLG77cU5rviA@mail.gmail.com>
References: <CABoe=cR9s8MvCM9iHZajUL42E0mJXttUqRdsR_GXr4MRjD6YCw@mail.gmail.com>
	<20200503153825.GK28974@telsasoft.com>
	<CABoe=cQQtDyXFcjo3iAg1Va=xdseQeTBgoezoLLLG77cU5rviA@mail.gmail.com>

On Mon, May 04, 2020 at 08:07:07PM +0100, Jamie Thompson wrote:
> Additionally, the execution plans for the 10th + following queries look
> fine, they have the same structure as if I run the query manually. It's not
> that the query plan switches, it seems as though the same query plan is
> just > 200X slower than usual.

Are you able to reproduce the problem manually ?

With/without PREPARE ?
https://www.postgresql.org/docs/current/sql-prepare.html

-- 
Justin

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