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From: Danny Milosavljevic <dannym@scratchpost.org>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: 30644@debbugs.gnu.org
Subject: bug#30644: Cuirass runs out of build users
Date: Sat, 24 Mar 2018 14:15:47 +0100	[thread overview]
Message-ID: <20180324141547.109dc91a@scratchpost.org> (raw)
In-Reply-To: <87zi3ethij.fsf@gnu.org>

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Hi Ludo,

I've checked it some more.  The shared cache uses unlock_notify, and the actual
database uses sqlite3_busy_handler (sqlite3_busy_timeout) when BUSY is returned.

The 5 in

ice-9/eval.scm:619:8: Throw to key `sqlite-error' with args `(#f 5 "database is locked")'.  
                                                                 ^^

means SQLITE_BUSY, so that's the actual database.

So the easiest way to work around it would be to call

  sqlite3_busy_timeout(db, 10); // ms

which would automatically repeatedly retry on busy until 10 ms have accumulated,
and only then give up.

There's also sqlite3_busy_handler which can be used to install a busy handler,
and of course in the future we could also handle SQLITE_BUSY ourselves and yield.

See also https://notabug.org/civodul/guile-sqlite3/pulls/4 for the former.

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  reply	other threads:[~2018-03-24 16:08 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-28  9:07 bug#30644: Cuirass runs out of build users Andreas Enge
2018-03-01 14:01 ` Ludovic Courtès
2018-03-01 20:35   ` Andreas Enge
2018-03-02 14:08 ` Efraim Flashner
2018-03-05  9:02   ` Andreas Enge
2018-03-05 15:53     ` Andreas Enge
2018-03-05 19:55       ` Andreas Enge
2018-03-07 22:35       ` Ludovic Courtès
2018-03-07 23:01         ` Danny Milosavljevic
2018-03-08  0:25           ` Danny Milosavljevic
2018-03-08  0:29             ` Danny Milosavljevic
2018-03-08 12:01               ` Ludovic Courtès
2018-03-11  6:06                 ` Danny Milosavljevic
2018-03-11 21:43                   ` Ludovic Courtès
2018-03-24 13:15                     ` Danny Milosavljevic [this message]
2018-03-25 12:40                       ` Ludovic Courtès
2021-03-25 13:17                     ` Mathieu Othacehe

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