Bug 82372

Summary: (SCSI AACRAID NFS)SLOW NFS or I/O performance with 2.4.18
Product: [Retired] Red Hat Linux Reporter: brien fwd <asfdasdf>
Component: kernelAssignee: Steve Dickson <steved>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.2CC: alan
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2003-12-17 02:21:52 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description brien fwd 2003-01-21 18:28:25 UTC
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461; .NET 
CLR 1.0.3705; .NET CLR 1.1.4322)

Description of problem:
have been running the 2.2.x series and then the 2.4.9 series kernels for a long 
time with no performance issues.  i then upgraded to 2.4.18-19.7.xsmp and saw a 
very large drop in i/o performance.

i am running a single server (nfs and imap) with multiple nfs clients.  the 
server seems to be choking on disk i/o.

the server is a dell poweredge 2450 (with perc 3/si raid 1+0 using the aacraid 
driver), 2x733Mhz PIII, 2GB RAM.

i'm running the ext3 filesystem and most mounts use the "noatime" option.

where there significant changes to NFS, aacraid, or file caching going from 
2.4.9 to 2.4.18?

any tips for troubleshooting this?

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


How reproducible:
Always

Steps to Reproduce:
1.see above
2.
3.
    

Additional info:

Comment 1 Alan Cox 2003-06-08 15:20:41 UTC
Is this still the case with the current errata ?