Re: JIT overhead slowdown

From: Andres Freund <andres(at)anarazel(dot)de>
To: Luis Carril <luis(dot)carril(at)swarm64(dot)com>
Cc: "pgsql-performance(at)lists(dot)postgresql(dot)org" <pgsql-performance(at)lists(dot)postgresql(dot)org>
Subject: Re: JIT overhead slowdown
Date: 2019-01-18 16:42:54
Message-ID: 20190118164254.p3p6gogijf3dh7q6@alap3.anarazel.de
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Hi,

On 2019-01-18 14:12:23 +0000, Luis Carril wrote:
> Is this behavior expected? Is the cost function for jitting missing some circumstances?

The costing doesn't take the effect of overhead of repeated JITing in
each worker into account. I could give you a test patch that does, if
you want to play around with it?

Greetings,

Andres Freund

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