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Bug 86400

Summary: 2.4.18-24, 1.4.18-26, 2.4.18-27 and 3wre raid 5
Product: [Retired] Red Hat Linux Reporter: Ray <raypitt>
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED WONTFIX QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.0CC: mitr
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2004-09-30 15:40:41 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Ray 2003-03-21 12:42:11 UTC
From Bugzilla Helper:
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Description of problem:
Seems to be a problem in the updated kernels and the 3ware controller. Comparing
the 2.4.18-14 to the updated 2.4.18-24, 2.4.18-26 and 2.4.18-27 with MySQL
selects shows the difference in the speed. A 70 million row table can be
duplicated ( by doing insert into select * from) in a hour with the 2.4.18-14
but using the updated kernels take over 4 hours. The 3ware is in raid5 mode and
the problem exists on several PC's. This problem is not bound to any 1 computer
or 3ware model, it seems to be in the 6000 and 7000 series. It is also not just
a problem with MySQL, seems to affect a ftp transfer as well. Typically we get
11MBs on a ftp transfer from PC to PC, but with the new kernel we seem to get
2MBs. Anything to do with writing to disk seems to have the problem.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Install updated kernel

Actual Results:  I/O slowdown

Expected Results:  Newer kernel should have speed improvment

Additional info:

Comment 1 Bugzilla owner 2004-09-30 15:40:41 UTC
Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem

The Fedora Legacy project ( maintains some older releases, 
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: