[Bug 846628] Re: gnu sort extremely slow in non C locale
Dave Gilbert
ubuntu at treblig.org
Sun Jan 8 00:23:03 UTC 2012
Hi Bijan,
I fell across a similar situation a while ago - but apparently this is the way that the specification is written; see:
http://www.gnu.org/software/coreutils/faq/#Sort-does-not-sort-in-normal-
order_0021
and:
http://old.nabble.com/sort---seems-deficient-td19360749.html
So as for the sort order, I think the order is dictated by the locale; and I suspect the problem is that in your case the '.'
isn't being treated as ordered with respect to anything else. Now as for how long it takes, I think there are two issues;
I can see it's much harder to do a sort when you have to take into account all these locale issues, and given your data perhaps it needs a lot more rearrangement to meet those rules.
** Changed in: coreutils (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/846628
Title:
gnu sort extremely slow in non C locale
Status in “coreutils” package in Ubuntu:
Invalid
Bug description:
I tried sorting an ascii file of about 300 Megs and 8 million lines
with gnu sort and it was taking forever.
After 10 minutes I stopped it. I tried another sort program and it
finished in about 40 seconds.
I then took the output of that second sort and I checked it in gnu
sort, which reported that some lines were out of order.
The following lines:
....bbbbbbbbbwbbwwbwwwwwww.ww...1
....bbbbbbbbbwbbwwbwwwwwwwww....0
....bbbbbbbbbwbwwbwbwwwww.ww..w.1
But they are not as far as I can tell. Then I thought the problem was the locale. Indeed my locale was set to:
LANG=en_CA.UTF-8
setting it to:
LANG=C
both made gnu sort finish the sort in 40 seconds, and confirm the
proper order.
Since the file is %100 ASCII (it only has the 6 characters ".01bw\n" I
think this is a bug, that the locale should make any difference.
Best regards,
Bijan
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: coreutils 8.5-1ubuntu6
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
Architecture: i386
Date: Sat Sep 10 15:59:07 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
LANGUAGE=en_CA:en
LANG=en_CA.UTF-8
SHELL=/bin/bash
SourcePackage: coreutils
UpgradeStatus: No upgrade log present (probably fresh install)
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