Re: New gist vacuum.

From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
To: Костя Кузнецов <chapaev28(at)ya(dot)ru>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: New gist vacuum.
Date: 2015-09-13 13:17:28
Message-ID: CAB7nPqRH5AmAAfSPskQSLBejz_TWfd9fH+na++RFwXRWnVKdpg@mail.gmail.com
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On Fri, Sep 11, 2015 at 7:52 AM, Костя Кузнецов <chapaev28(at)ya(dot)ru> wrote:
> old version:
>
> INFO: vacuuming "public.point_tbl"
> INFO: scanned index "gpointind" to remove 11184520 row versions
> DETAIL: CPU 84.70s/72.26u sec elapsed 27007.14 sec.
> [...]
>
> new vacuum is about
> INFO: vacuuming "public.point_tbl"
> INFO: scanned index "gpointind" to remove 11184520 row versions
> DETAIL: CPU 13.00s/27.57u sec elapsed 1864.22 sec.
> [...]
> There is a big speed up + we can reuse some pages.

Indeed. Interesting. You should definitely add your patch to the next
commit fest:
https://commitfest.postgresql.org/7/
--
Michael

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