From: ludo@gnu.org (Ludovic Courtès)
To: 24937@debbugs.gnu.org
Subject: bug#24937: "deleting unused links" GC phase is too slow
Date: Sun, 13 Nov 2016 18:41:01 +0100 [thread overview]
Message-ID: <87wpg7ffbm.fsf@gnu.org> (raw)
‘LocalStore::removeUnusedLinks’ traverses all the entries in
/gnu/store/.links and calls lstat(2) on each one of them and checks
‘st_nlink’ to determine whether they can be deleted.
There are two problems: lstat(2) can be slow on spinning disks as found
on hydra.gnu.org, and the algorithm is proportional in the number of
entries in /gnu/store/.links, which is a lot on hydra.gnu.org.
Ludo’.
next reply other threads:[~2016-11-13 17:42 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-13 17:41 Ludovic Courtès [this message]
2016-12-09 22:43 ` bug#24937: "deleting unused links" GC phase is too slow Ludovic Courtès
2016-12-11 13:46 ` Ludovic Courtès
2016-12-11 14:23 ` Mark H Weaver
2016-12-11 18:02 ` Ludovic Courtès
2016-12-11 19:27 ` Mark H Weaver
2016-12-13 0:00 ` Ludovic Courtès
2016-12-13 12:48 ` Mark H Weaver
2016-12-13 17:02 ` Ludovic Courtès
2016-12-13 17:18 ` Ricardo Wurmus
2020-04-16 13:26 ` Ricardo Wurmus
2020-04-16 14:27 ` Ricardo Wurmus
2020-04-17 8:16 ` Ludovic Courtès
2020-04-17 8:28 ` Ricardo Wurmus
2016-12-13 4:09 ` Mark H Weaver
2016-12-15 1:19 ` Mark H Weaver
2021-11-09 14:44 ` Ludovic Courtès
2021-11-09 15:00 ` Ludovic Courtès
2021-11-11 20:59 ` Maxim Cournoyer
2021-11-13 16:56 ` Ludovic Courtès
2021-11-13 21:37 ` bug#24937: [PATCH 1/2] tests: Factorize 'file=?' Ludovic Courtès
2021-11-13 21:37 ` bug#24937: [PATCH 2/2] daemon: Do not deduplicate files smaller than 4 KiB Ludovic Courtès
2021-11-16 13:54 ` bug#24937: "deleting unused links" GC phase is too slow Ludovic Courtès
2021-11-13 21:45 ` Ludovic Courtès
2021-11-22 2:30 ` John Kehayias via Bug reports for GNU Guix
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