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From: Laurenz Albe <[email protected]>
To: David Rowley <[email protected]>
To: Marc Millas <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: explain
Date: Thu, 24 Apr 2025 17:06:52 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAApHDvqN-mSE=9cgApVfp0qQtuasD_-p6PTRqygT8+HrPtb2zA@mail.gmail.com>
References: <CADX_1aZDtzTaoV5XNi__VbQCj7iPGaU6i5XANjjPwLwF7Acsww@mail.gmail.com>
	<CAApHDvqN-mSE=9cgApVfp0qQtuasD_-p6PTRqygT8+HrPtb2zA@mail.gmail.com>

On Fri, 2025-04-25 at 01:41 +1200, David Rowley wrote:
> On Fri, 25 Apr 2025 at 01:32, Marc Millas <[email protected]> wrote:
> > Nested Loop Left Join  (cost=941400.77..966327.57 rows=3 width=653) (actual time=52655.694..62533.811 rows=346 loops=1)
> >   Buffers: shared hit=10068265 read=396705 dirtied=1858 written=218, temp read=429687 written=115187
> >   I/O Timings: read=79368.246 write=11.486
> > 
> > So, the total execution time is 52655 ms ok
> > and the total time for i/o is...79368 ms
> > 
> > how ???
> 
> The 79.3 seconds is the total time spent doing reads for all parallel
> workers. 52.6 seconds is the wall clock time elapsed to execute the
> query.

But wouldn't it read "loops=3" or similar then?

Yours,
Laurenz Albe

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