GNU bug report logs - #24937
"deleting unused links" GC phase is too slow

Previous Next

Package: guix;

Reported by: ludo <at> gnu.org (Ludovic Courtès)

Date: Sun, 13 Nov 2016 17:42:02 UTC

Severity: important

Full log

View this message in rfc822 format

From: ludo <at> gnu.org (Ludovic Courtès)
To: 24937 <at> debbugs.gnu.org
Subject: bug#24937: "deleting unused links" GC phase is too slow
Date: Sun, 13 Nov 2016 18:41:01 +0100

‘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’.
This bug report was last modified 3 years and 204 days ago.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.