From: "Ludovic Courtès" <ludo@gnu.org>
To: Mathieu Othacehe <othacehe@gnu.org>
Cc: 51787@debbugs.gnu.org
Subject: bug#51787: GC takes more than 9 hours on berlin
Date: Sat, 27 Nov 2021 12:11:04 +0100 [thread overview]
Message-ID: <87ilwdam5z.fsf@gnu.org> (raw)
In-Reply-To: <87zgpuhig7.fsf@gnu.org> ("Ludovic Courtès"'s message of "Tue, 23 Nov 2021 18:48:08 +0100")
Ludovic Courtès <ludo@gnu.org> skribis:
> • Stracing the session’s guix-daemon process during GC suggests that
> most of the time goes into I/O from ‘db.sqlite’. It’s not
> surprising because that GC phase is basically about browsing the
> database, but it does seem to take a little too long for each store
> item.
Stracing the client shows that the daemon spends several seconds on a
single store item occasionally:
--8<---------------cut here---------------start------------->8---
read(27, "gmlo\0\0\0\0", 8) = 8 <0.363064>
read(27, "c\0\0\0\0\0\0\0", 8) = 8 <0.000013>
read(27, "[95%] deleting '/gnu/store/p6r2jjy6frp682z3x94nvnmdh71p1p58-ecl-quicksearch-0.01"..., 104) = 104 <0.000010>
write(2, "[95%] deleting '/gnu/store/p6r2jjy6frp682z3x94nvnmdh71p1p58-ecl-quicksearch-0.01"..., 99) = 99 <0.000019>
read(27, "gmlo\0\0\0\0", 8) = 8 <0.017863>
read(27, "^\0\0\0\0\0\0\0", 8) = 8 <0.000019>
read(27, "[95%] deleting '/gnu/store/v6zd510kfmqd8j4w7q3zy9bid1fj96dk-shepherd-guix-daemon"..., 96) = 96 <0.000007>
write(2, "[95%] deleting '/gnu/store/v6zd510kfmqd8j4w7q3zy9bid1fj96dk-shepherd-guix-daemon"..., 94) = 94 <0.000012>
read(27, "gmlo\0\0\0\0", 8) = 8 <5.861071>
read(27, "T\0\0\0\0\0\0\0", 8) = 8 <0.000061>
read(27, "[95%] deleting '/gnu/store/0hpwig8cwdnzygjjzs9zjbxicvhif2vv-rust-bitvec-0.19.4.d"..., 88) = 88 <0.000087>
write(2, "[95%] deleting '/gnu/store/0hpwig8cwdnzygjjzs9zjbxicvhif2vv-rust-bitvec-0.19.4.d"..., 84) = 84 <0.000033>
--8<---------------cut here---------------end--------------->8---
(Notice ‘read’ taking 5.9s above.)
Ludo’.
next prev parent reply other threads:[~2021-11-27 11:12 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-12 11:49 bug#51787: GC takes more than 9 hours on berlin Mathieu Othacehe
2021-11-12 19:17 ` Mathieu Othacehe
2021-11-22 9:16 ` zimoun
2021-11-23 17:48 ` Ludovic Courtès
2021-11-25 13:24 ` Christopher Baines
2021-11-27 11:23 ` Ludovic Courtès
2021-12-03 9:45 ` Mathieu Othacehe
2021-12-10 6:24 ` Mathieu Othacehe
2021-12-10 10:21 ` Ludovic Courtès
2021-12-10 17:11 ` Mathieu Othacehe
2021-12-10 21:54 ` Ludovic Courtès
2021-12-11 9:42 ` Mathieu Othacehe
2021-12-12 17:09 ` Mathieu Othacehe
2021-12-13 16:13 ` Christian Thäter
2021-12-14 3:31 ` Christian Thäter
2021-12-17 10:55 ` Mathieu Othacehe
2021-12-17 13:06 ` Ricardo Wurmus
2021-12-17 14:08 ` Ricardo Wurmus
2021-12-10 17:11 ` Mathieu Othacehe
2021-11-27 11:11 ` Ludovic Courtès [this message]
2021-12-10 19:38 ` Ricardo Wurmus
2021-12-20 21:12 ` Ricardo Wurmus
2023-08-16 10:53 ` Maxim Cournoyer
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