From: Justin Pryzby <pryzby@telsasoft.com>
To: Shira Bezalel <shira@sfei.org>
Cc: pgsql-performance@postgresql.org
Subject: Re: Seeking reason behind performance gain in 12 with HashAggregate
Date: Mon, 13 Jan 2020 10:42:20 -0600
Message-ID: <20200113164220.GH26045@telsasoft.com> (raw)
In-Reply-To: <CAE0KEwGnDspRJjX=cdvGC69=F=76jbhiViDp=T5pPYR0xF2NAQ@mail.gmail.com>
References: <CAE0KEwGnDspRJjX=cdvGC69=F=76jbhiViDp=T5pPYR0xF2NAQ@mail.gmail.com>
On Mon, Jan 13, 2020 at 08:29:05AM -0800, Shira Bezalel wrote:
> Here is the EXPLAIN (ANALYZE ON, BUFFERS ON) output from both systems:
>
> 9.6 plan <https://explain.depesz.com/s/W8HN;
> 12.1 plan <https://explain.depesz.com/s/lIRS;
> Is there something that was changed/improved in either 10, 11 or 12 that this
> behavior can be attributed to?
v12 has JIT enabled by default.
You can test if that's significant with SET jit=off.
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To: pgsql-performance@postgresql.org
Cc: pryzby@telsasoft.com, shira@sfei.org
Subject: Re: Seeking reason behind performance gain in 12 with HashAggregate
In-Reply-To: <20200113164220.GH26045@telsasoft.com>
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