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From: "Ludovic Courtès" <ludo@gnu.org>
To: 43564@debbugs.gnu.org
Cc: othacehe@gnu.org
Subject: bug#43564: cuirass: Contention while registering new builds.
Date: Mon, 05 Oct 2020 14:07:44 +0200	[thread overview]
Message-ID: <87v9fo27vz.fsf@gnu.org> (raw)
In-Reply-To: <87k0wee3ud.fsf@gnu.org> (Mathieu Othacehe's message of "Mon, 28 Sep 2020 09:51:38 +0200")

Hello!

Mathieu Othacehe <othacehe@gnu.org> skribis:

> Turns out, once an evaluation is over, new builds are registered. This
> registration tries to insert a new build for each derivation returned by
> the evaluation phase. If the new build does not add a new output, the
> insertion query is then rollbacked. This means that there are at least
> as many insertion queries as new derivations.

Isn’t that the real problem, that we’re doing one transaction per
derivation?

Ideally, upon evaluation completion, I’d expect us to create a single
transaction that registers all 50K derivations at once, no?

Thanks for the great improvements in this area!

Ludo’.




  parent reply	other threads:[~2020-10-05 12:08 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-22 16:52 bug#43564: cuirass: Contention while registering new builds Mathieu Othacehe
2020-09-28  7:51 ` Mathieu Othacehe
2020-09-28  8:17   ` Mathieu Othacehe
2020-09-29 15:02   ` Mathieu Othacehe
2020-10-04 11:12     ` Mathieu Othacehe
2020-10-05 12:07   ` Ludovic Courtès [this message]
2020-10-05 13:09     ` Mathieu Othacehe
2020-10-09  7:59       ` Ludovic Courtès

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