| From: | David Rowley <dgrowleyml(at)gmail(dot)com> |
|---|---|
| To: | Marc Millas <marc(dot)millas(at)mokadb(dot)com> |
| Cc: | "pgsql-general(at)lists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: explain |
| Date: | 2025-04-24 13:41:34 |
| Message-ID: | CAApHDvqN-mSE=9cgApVfp0qQtuasD_-p6PTRqygT8+HrPtb2zA@mail.gmail.com |
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| Lists: | pgsql-general |
On Fri, 25 Apr 2025 at 01:32, Marc Millas <marc(dot)millas(at)mokadb(dot)com> 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.
David
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