Bug 1412800

Summary:	huge slowdown of egrep
Product:	[Fedora] Fedora	Reporter:	Fabrice Bellet <fabrice>
Component:	grep	Assignee:	Jaroslav Škarvada <jskarvad>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	25	CC:	fedora, jskarvad, lkundrak
Target Milestone:	---
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Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:	grep-2.27-2.fc25	Doc Type:	If docs needed, set a value
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Last Closed:	2017-02-24 22:50:10 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Fabrice Bellet 2017-01-12 20:17:55 UTC

I noticed a huge slow down of egrep after upgrading from Fedora 24 to Fedora 25. Basically running the command "egrep  'selected pair:|STATE-CHANGE' empathy-call.log", on a file whose size is 2GB, with 14213617 lines, and 11456 matching lines.

It takes ~5s on Fedora 24, and 90 seconds on Fedora 25.

Comment 1 Fabrice Bellet 2017-01-12 21:38:10 UTC

The problem is in 2.27, and has been fixed upstream by commit a43f8e6e83 in gnulib.

Comment 2 Andy Blanchard 2017-02-20 12:31:51 UTC

Seeing this here too with some major issues for logfile processing.  Is there any ETA on the fix working its way downstream since there's no sign of an update to grep in testing yet?

Comment 3 Andy Blanchard 2017-02-20 12:41:20 UTC

FYI, as a workaround, reverting to v2.26-2.fc25 from Koji solves the performance issues but re-introduces the bugs fixed in v2.27 of grep, so pick your poison:

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=24941
https://koji.fedoraproject.org/koji/buildinfo?buildID=807299

Comment 4 Fedora Update System 2017-02-20 21:39:49 UTC

grep-2.27-2.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-1d6cb60597

Comment 5 Fedora Update System 2017-02-22 21:07:32 UTC

grep-2.27-2.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-1d6cb60597

Comment 6 Fedora Update System 2017-02-24 22:50:10 UTC

grep-2.27-2.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.