From: | Amit Langote <amitlangote09(at)gmail(dot)com> |
---|---|
To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Parallel Seq Scan |
Date: | 2015-11-11 15:15:54 |
Message-ID: | CA+HiwqFidHx4KoRJW_ipKegPwSnGgh01uXC9mksTogTGaVJtEA@mail.gmail.com |
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Lists: | pgsql-hackers |
On Wed, Nov 11, 2015 at 11:53 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> For those following along at home, here's a demo:
>
> rhaas=# \timing
> Timing is on.
> rhaas=# select * from pgbench_accounts where filler like '%a%';
> aid | bid | abalance | filler
> -----+-----+----------+--------
> (0 rows)
>
> Time: 743.061 ms
> rhaas=# set max_parallel_degree = 4;
> SET
> Time: 0.270 ms
> rhaas=# select * from pgbench_accounts where filler like '%a%';
> aid | bid | abalance | filler
> -----+-----+----------+--------
> (0 rows)
>
> Time: 213.412 ms
>
> This is all pretty primitive at this point - there are still lots of
> things that need to be fixed and improved, and it applies to only the
> very simplest cases at present, but, hey, parallel query. Check it
> out.
Yay! Great work guys!
Thanks,
Amit
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