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From: Danny Milosavljevic <dannym@scratchpost.org>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: guix-devel <guix-devel@gnu.org>
Subject: Re: Cuirass news
Date: Mon, 19 Feb 2018 16:35:06 +0100	[thread overview]
Message-ID: <20180219163506.2037e56e@scratchpost.org> (raw)
In-Reply-To: <877erfqhy4.fsf@gnu.org>

Hi Ludo,

On Thu, 15 Feb 2018 00:17:55 +0100
ludo@gnu.org (Ludovic Courtès) wrote:

> Turns out creating the relevant indexes helps a lot, unsurprisingly I
> guess:
> 
>   https://git.savannah.gnu.org/cgit/guix/guix-cuirass.git/commit/?id=db27955ad3fae260ee2aa4bace8dd6a4115d338c

Yup.  It's a tradeoff because now the DBMS has to update the indices every time
you insert or update, but reading is now faster.

I guess we query more than we build so it's fine.

> I also discovered SQLite’s “EXPLAIN QUERY PLAN”, which is pretty cool:
> 
>   https://www.sqlite.org/lang_explain.html

Yup :)

> With that /latestbuilds still usually takes a bit more than 2 seconds.
> This could be due to the repeated ‘Outputs’ queries via ‘db-get-outputs’.

Oh yeah, I wanted to optimize that.  It won't be that nice but it will
be faster.

First, I'll send a patch simplifying db-get-builds while retaining the
current functionality.

  reply	other threads:[~2018-02-19 15:35 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-24 22:12 Cuirass news Ludovic Courtès
2018-01-25 10:55 ` Mathieu Othacehe
2018-01-25 10:59   ` Mathieu Othacehe
2018-01-25 13:09     ` Ludovic Courtès
2018-01-26 14:30       ` Danny Milosavljevic
2018-01-27 16:01         ` Ludovic Courtès
2018-01-27 17:18           ` Danny Milosavljevic
2018-01-27 19:12             ` Danny Milosavljevic
2018-01-28 21:47             ` Ludovic Courtès
2018-01-28 22:23               ` Danny Milosavljevic
2018-01-29  9:57               ` Andy Wingo
2018-02-08 13:37             ` Ludovic Courtès
2018-02-08 16:29               ` Danny Milosavljevic
2018-02-08 22:21                 ` Ludovic Courtès
2018-02-08 23:05                   ` Danny Milosavljevic
2018-02-09  6:17                     ` Gábor Boskovits
2018-02-09  9:41                     ` Ludovic Courtès
2018-02-09 11:29                       ` Danny Milosavljevic
2018-02-09 16:53                         ` Ludovic Courtès
2018-02-09 17:06                           ` Danny Milosavljevic
2018-02-10 11:18                             ` Ludovic Courtès
2018-02-13  9:12                               ` Danny Milosavljevic
2018-02-14 13:43                                 ` Ludovic Courtès
2018-02-14 23:17                                   ` Ludovic Courtès
2018-02-19 15:35                                     ` Danny Milosavljevic [this message]
2018-02-19 15:35                                       ` [PATCH] database: Simplify 'db-get-builds' Danny Milosavljevic
2018-02-19 17:52                                       ` [PATCH] database: db-get-builds: Inline output selection Danny Milosavljevic
2018-02-19 22:08                                       ` Cuirass news Danny Milosavljevic
2018-03-02 13:21                                         ` Ludovic Courtès
2018-03-02 22:06                                           ` Ludovic Courtès
2018-03-02 23:29                                           ` Danny Milosavljevic
2018-02-14 23:21                                   ` Ludovic Courtès
2018-01-25 21:06 ` Ricardo Wurmus
2018-01-26 11:12   ` Ludovic Courtès
2018-01-25 22:28 ` Danny Milosavljevic
2018-01-26 10:47   ` Ludovic Courtès
2018-01-28 12:33     ` Cuirass frontend Danny Milosavljevic
2018-01-29 17:42       ` Ludovic Courtès
2018-01-26  0:46 ` Cuirass news Danny Milosavljevic
2018-01-27 17:27   ` Danny Milosavljevic
2018-01-28 21:48     ` Ludovic Courtès
2018-01-26 17:55 ` Jan Nieuwenhuizen

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